{"kind": "tool", "major": "18", "item": {"slug": "vacuumdb", "name": "vacuumdb", "name_zh": "", "category": "\u5ba2\u6237\u7aef\u7a0b\u5e8f", "summary": "vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93", "aliases": ["vacuumdb"], "content_hash": "c27670f3b860d4a582ae83c5bc8a9a4c9538a737fb15aab1fc124f92bb54704f", "versions": {"10": {"facts": [{"label": "\u624b\u518c\u4e2d\u7684\u53ef\u6267\u884c\u7a0b\u5e8f", "value": "vacuumdb"}, {"label": "\u7a0b\u5e8f\u7248\u672c", "value": "10.23"}, {"label": "\u53c2\u8003\u6e05\u5355", "value": "\u5ba2\u6237\u7aef\u7a0b\u5e8f"}, {"label": "\u9009\u9879\u5b9a\u4e49\u7ec4", "value": "19"}], "tables": [{"key": "options", "rows": [{"summary": "\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-a --all"}}, {"summary": "\u56de\u663e vacuumdb \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-e --echo"}}, {"summary": "\u6267\u884c \u201c \u5b8c\u5168 \u201d \u6e05\u7406\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-f --full"}}, {"summary": "\u6fc0\u8fdb\u5730 \u201c \u51bb\u7ed3 \u201d \u5143\u7ec4\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-F --freeze"}}, {"summary": "\u901a\u8fc7\u540c\u65f6\u8fd0\u884c njobs \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-j njobs --jobs= njobs"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\uff0c\u7c7b\u4f3c --analyze-only \u3002\u4f7f\u7528\u4e0d\u540c\u7684\u914d\u7f6e\u8bbe\u7f6e\u8fd0\u884c\u591a\u4e2a\uff08\u76ee\u524d\u4e3a\u4e09\u4e2a\uff09\u5206\u6790\u9636\u6bb5\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/10/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/10/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/10/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/10/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/10/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/10/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/10/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/10/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/10/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/10/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/10/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/10/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster.", "signature": "--analyze-in-stages", "source_url": "/docs/10/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster. This option is useful to analyze a database that was newly populated from a restored dump or by pg_upgrade . This option will try to create some statistics as fast as possible, to make the database usable, and then produce full statistics in the subsequent stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/10/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/10/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/10/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/10/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/10/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/10/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/10/app-vacuumdb.html", "description": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/source/v10.23/postgresql-10.23.tar.bz2", "label": "10.23", "major": "10", "channel": "historical", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/10/postgresql-10-A4.pdf", "bytes": 12631706, "pages": 2591, "sha256": "34497ab9efb45c5bdf1bd11b9016b5451354feb462fa029cf74557a5fa5fbbc1", "built_at": "2026-09-26"}, "US": {"url": "/files/documentation/pdf/10/postgresql-10-US.pdf", "bytes": 12531684, "pages": 2724, "sha256": "429cc7133ddf4f97c560aa466dc9caea4b718721a8321e293357037cf0af4733", "built_at": "2026-09-26"}}, "tree": "10", "index": "index.html", "major": "10", "pages": 1085, "release": "10.23", "source_url": "https://ftp.postgresql.org/pub/source/v10.23/postgresql-10.23.tar.bz2", "svg_assets": 0, "source_mode": "en HTML verified against the pinned official archive", "source_sha256": "94a4b2528372458e5662c18d406629266667c437198160a18cdfd2c4a4d6eee9"}, "revision": "f9301feba91e2e2566038a36b8cee0e4402db68989538f88670fddd20b1f78ea", "evidence_kind": "English manual and source declarations", "source_sha256": "94a4b2528372458e5662c18d406629266667c437198160a18cdfd2c4a4d6eee9"}, "sources": [{"url": "https://pg.center/docs/10/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "10.23 English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "6c592e8a91d76bcd6f312762c3ae9792b9f153eb0e7c1535bc2e937cc788cd2c", "language": "en", "original_url": "/docs/10/app-vacuumdb.html"}, {"url": "https://pg.center/docs/10/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "e4330732b6acd6c025a1fbdce45574b23d964de847a1b849ea88b98ab628d2e2", "language": "en", "original_url": "/docs/10/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]\nvacuumdb [ connection-option ...] [ option ...] -a | --all", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.20.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [<em class=\"replaceable\"><code>dbname</code></em>]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.20.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] <code class=\"option\">-a</code> | <code class=\"option\">--all</code></p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u662f SQL \u547d\u4ee4<a class=\"xref\" href=\"/docs/10/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/10/libpq.html#LIBPQ-CONNSTRING\" title=\"33.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/10/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u53d1\u751f\u6b7b\u9501\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\uff0c\u7c7b\u4f3c<code class=\"option\">--analyze-only</code>\u3002\u4f7f\u7528\u4e0d\u540c\u7684\u914d\u7f6e\u8bbe\u7f6e\u8fd0\u884c\u591a\u4e2a\uff08\u76ee\u524d\u4e3a\u4e09\u4e2a\uff09\u5206\u6790\u9636\u6bb5\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u9002\u5408\u5206\u6790\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u6216<code class=\"command\">pg_upgrade</code>\u586b\u5145\u7684\u6570\u636e\u5e93\u3002\u5b83\u4f1a\u5c3d\u5feb\u5c1d\u8bd5\u751f\u6210\u4e00\u4e9b\u7edf\u8ba1\u4fe1\u606f\uff0c\u8ba9\u6570\u636e\u5e93\u80fd\u591f\u4f7f\u7528\uff0c\u7136\u540e\u5728\u540e\u7eed\u9636\u6bb5\u751f\u6210\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/10/libpq.html#LIBPQ-CONNSTRING\" title=\"33.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/10/libpq-envars.html\" title=\"33.14.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a033.14\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u9047\u56f0\u96be\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/10/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/10/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span> \u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u4e5f\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.9\">\n<h2 lang=\"zh\">\u6ce8\u89e3</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u53ef\u80fd\u9700\u8981\u591a\u6b21\u8fde\u63a5\u5230<span class=\"productname\">PostgreSQL</span>\u670d\u52a1\u5668\uff0c\u6bcf\u6b21\u90fd\u8981\u8be2\u95ee\u5bc6\u7801\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528<code class=\"filename\">~/.pgpass</code>\u6587\u4ef6\u4f1a\u6bd4\u8f83\u65b9\u4fbf\u3002\u66f4\u591a\u4fe1\u606f\u89c1<a class=\"xref\" href=\"/docs/10/libpq-pgpass.html\" title=\"33.15.\u00a0\u5bc6\u7801\u6587\u4ef6\">\u7b2c\u00a033.15\u00a0\u8282</a>\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.10\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre></div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.11\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2>\n<span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/10/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span></div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/10/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "b3ce926b86bd16ae5819f710449a1c1ff978b5ea407ee21107697392a6912155", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[10]/h2[0]", "#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[0]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[1]", "#APP-VACUUMDB/div[5]/p[1]", "#APP-VACUUMDB/div[5]/p[3]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[1]", "#APP-VACUUMDB/div[6]/h2[0]", "#APP-VACUUMDB/div[6]/p[2]", "#APP-VACUUMDB/div[7]/h2[0]", "#APP-VACUUMDB/div[7]/p[1]", "#APP-VACUUMDB/div[8]/h2[0]", "#APP-VACUUMDB/div[8]/p[1]", "#APP-VACUUMDB/div[9]/h2[0]", "#APP-VACUUMDB/div[9]/p[1]", "#APP-VACUUMDB/div[9]/p[3]"]}], "language": "zh", "original_text": {"/versions/10/description/0": "vacuumdb \u2014 garbage-collect and analyze a PostgreSQL database", "/versions/10/facts/0/label": "Documented executable", "/versions/10/facts/1/label": "Executable version", "/versions/10/facts/2/label": "Reference inventory", "/versions/10/facts/2/value": "Client applications", "/versions/10/facts/3/label": "Option definition groups", "/versions/10/tables/0/title": "Documented options", "/versions/10/tables/1/title": "Environment variables", "/versions/10/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/10/tables/0/rows/1/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/10/tables/0/rows/2/summary": "Perform \u201c full \u201d vacuuming.", "/versions/10/tables/0/rows/3/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/10/tables/0/rows/4/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server.", "/versions/10/tables/0/rows/5/summary": "Do not display progress messages.", "/versions/10/tables/0/rows/6/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/10/tables/0/rows/7/summary": "Print detailed information during processing.", "/versions/10/tables/0/rows/8/summary": "Print the vacuumdb version and exit.", "/versions/10/tables/0/rows/9/summary": "Also calculate statistics for use by the optimizer.", "/versions/10/tables/0/columns/0/label": "Option and arguments", "/versions/10/tables/0/columns/1/label": "Description", "/versions/10/tables/0/rows/10/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/10/tables/0/rows/11/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster.", "/versions/10/tables/0/rows/12/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/10/tables/0/rows/13/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/10/tables/0/rows/14/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/10/tables/0/rows/15/summary": "User name to connect as.", "/versions/10/tables/0/rows/16/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/10/tables/0/rows/17/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/10/tables/0/rows/18/summary": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/10/tables/1/columns/0/label": "Variable", "/versions/10/tables/1/columns/1/label": "Meaning", "/versions/10/tables/1/rows/0/description": "Default connection parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "a54a0b2242ae1a5351f38020153625c156ba2789405250f64d29a7d02d441a00"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster. This option is useful to analyze a database that was newly populated from a restored dump or by pg_upgrade . This option will try to create some statistics as fast as possible, to make the database usable, and then produce full statistics in the subsequent stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}]}, "comparison_hash": "1e4dee8b319815c534ef0dabb5a7b059bd916205ae64c2fde59591b0d20c3c56", "manual_language": "zh"}, "11": {"facts": [{"label": "\u624b\u518c\u4e2d\u7684\u53ef\u6267\u884c\u7a0b\u5e8f", "value": "vacuumdb"}, {"label": "\u7a0b\u5e8f\u7248\u672c", "value": "11.22"}, {"label": "\u53c2\u8003\u6e05\u5355", "value": "\u5ba2\u6237\u7aef\u7a0b\u5e8f"}, {"label": "\u9009\u9879\u5b9a\u4e49\u7ec4", "value": "19"}], "tables": [{"key": "options", "rows": [{"summary": "\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-a --all"}}, {"summary": "\u56de\u663e vacuumdb \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-e --echo"}}, {"summary": "\u6267\u884c \u201c \u5b8c\u5168 \u201d \u6e05\u7406\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-f --full"}}, {"summary": "\u6fc0\u8fdb\u5730 \u201c \u51bb\u7ed3 \u201d \u5143\u7ec4\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-F --freeze"}}, {"summary": "\u901a\u8fc7\u540c\u65f6\u8fd0\u884c njobs \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-j njobs --jobs= njobs"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\uff0c\u7c7b\u4f3c --analyze-only \u3002\u4f7f\u7528\u4e0d\u540c\u7684\u914d\u7f6e\u8bbe\u7f6e\u8fd0\u884c\u591a\u4e2a\uff08\u76ee\u524d\u4e3a\u4e09\u4e2a\uff09\u5206\u6790\u9636\u6bb5\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/11/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/11/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/11/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/11/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/11/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/11/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/11/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/11/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/11/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/11/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/11/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/11/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster.", "signature": "--analyze-in-stages", "source_url": "/docs/11/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster. This option is useful to analyze a database that was newly populated from a restored dump or by pg_upgrade . This option will try to create some statistics as fast as possible, to make the database usable, and then produce full statistics in the subsequent stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/11/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/11/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/11/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/11/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/11/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/11/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/11/app-vacuumdb.html", "description": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/source/v11.22/postgresql-11.22.tar.bz2", "label": "11.22", "major": "11", "channel": "historical", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/11/postgresql-11-A4.pdf", "bytes": 13057499, "pages": 2732, "sha256": "41d75855e610d0d9b8802b87dc5b080bef8d7e91c7cf69401fbf8d3cf801b4b5", "built_at": "2026-09-26"}, "US": {"url": "/files/documentation/pdf/11/postgresql-11-US.pdf", "bytes": 12961189, "pages": 2883, "sha256": "6a8899ef36935a5b7ed2b436207564a567a4ef1eb1c2200195876b8de4d4fa30", "built_at": "2026-09-26"}}, "tree": "11", "index": "index.html", "major": "11", "pages": 1125, "release": "11.22", "source_url": "https://ftp.postgresql.org/pub/source/v11.22/postgresql-11.22.tar.bz2", "svg_assets": 0, "source_mode": "en HTML verified against the pinned official archive", "source_sha256": "2cb7c97d7a0d7278851bbc9c61f467b69c094c72b81740b751108e7892ebe1f0"}, "revision": "53315ddaf3b3f9e6669fd1edc096bbb2cd4a65ea3e836c89e542b43af9ba3a7f", "evidence_kind": "English manual and source declarations", "source_sha256": "2cb7c97d7a0d7278851bbc9c61f467b69c094c72b81740b751108e7892ebe1f0"}, "sources": [{"url": "https://pg.center/docs/11/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "11.22 English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "5faf89888181a6906aada893595bbba28e712aa028929d40894782d06fdbdb88", "language": "en", "original_url": "/docs/11/app-vacuumdb.html"}, {"url": "https://pg.center/docs/11/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "3a30e696058b118a55cc42892c39671d9bae86f77e1024d5ebcc4688ad9ab4c3", "language": "en", "original_url": "/docs/11/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]\nvacuumdb [ connection-option ...] [ option ...] -a | --all", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.20.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [<em class=\"replaceable\"><code>dbname</code></em>]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.20.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] <code class=\"option\">-a</code> | <code class=\"option\">--all</code></p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f SQL \u547d\u4ee4<a class=\"xref\" href=\"/docs/11/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/11/libpq.html#LIBPQ-CONNSTRING\" title=\"34.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/11/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u53d1\u751f\u6b7b\u9501\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\uff0c\u7c7b\u4f3c<code class=\"option\">--analyze-only</code>\u3002\u4f7f\u7528\u4e0d\u540c\u7684\u914d\u7f6e\u8bbe\u7f6e\u8fd0\u884c\u591a\u4e2a\uff08\u76ee\u524d\u4e3a\u4e09\u4e2a\uff09\u5206\u6790\u9636\u6bb5\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u9002\u5408\u5206\u6790\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u6216<code class=\"command\">pg_upgrade</code>\u586b\u5145\u7684\u6570\u636e\u5e93\u3002\u5b83\u4f1a\u5c3d\u5feb\u5c1d\u8bd5\u751f\u6210\u4e00\u4e9b\u7edf\u8ba1\u4fe1\u606f\uff0c\u8ba9\u6570\u636e\u5e93\u80fd\u591f\u4f7f\u7528\uff0c\u7136\u540e\u5728\u540e\u7eed\u9636\u6bb5\u751f\u6210\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/11/libpq.html#LIBPQ-CONNSTRING\" title=\"34.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/11/libpq-envars.html\" title=\"34.14.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a034.14\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u9047\u56f0\u96be\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/11/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/11/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span> \u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u4e5f\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.9\">\n<h2 lang=\"zh\">\u6ce8\u89e3</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u53ef\u80fd\u9700\u8981\u591a\u6b21\u8fde\u63a5\u5230<span class=\"productname\">PostgreSQL</span>\u670d\u52a1\u5668\uff0c\u6bcf\u6b21\u90fd\u8981\u8be2\u95ee\u5bc6\u7801\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528<code class=\"filename\">~/.pgpass</code>\u6587\u4ef6\u4f1a\u6bd4\u8f83\u65b9\u4fbf\u3002\u66f4\u591a\u4fe1\u606f\u89c1<a class=\"xref\" href=\"/docs/11/libpq-pgpass.html\" title=\"34.15.\u00a0\u5bc6\u7801\u6587\u4ef6\">\u7b2c\u00a034.15\u00a0\u8282</a>\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.10\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.11\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2><span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/11/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span>\n</div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/11/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "76ae3e01bb1bb56f43cf7967ca54911e1fdfc6a649a5a951d1c9d1aba1eb076b", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[10]/h2[0]", "#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[0]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[1]", "#APP-VACUUMDB/div[5]/p[1]", "#APP-VACUUMDB/div[5]/p[3]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[1]", "#APP-VACUUMDB/div[6]/h2[0]", "#APP-VACUUMDB/div[6]/p[2]", "#APP-VACUUMDB/div[7]/h2[0]", "#APP-VACUUMDB/div[7]/p[1]", "#APP-VACUUMDB/div[8]/h2[0]", "#APP-VACUUMDB/div[8]/p[1]", "#APP-VACUUMDB/div[9]/h2[0]", "#APP-VACUUMDB/div[9]/p[1]", "#APP-VACUUMDB/div[9]/p[3]"]}], "language": "zh", "original_text": {"/versions/11/description/0": "vacuumdb \u2014 garbage-collect and analyze a PostgreSQL database", "/versions/11/facts/0/label": "Documented executable", "/versions/11/facts/1/label": "Executable version", "/versions/11/facts/2/label": "Reference inventory", "/versions/11/facts/2/value": "Client applications", "/versions/11/facts/3/label": "Option definition groups", "/versions/11/tables/0/title": "Documented options", "/versions/11/tables/1/title": "Environment variables", "/versions/11/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/11/tables/0/rows/1/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/11/tables/0/rows/2/summary": "Perform \u201c full \u201d vacuuming.", "/versions/11/tables/0/rows/3/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/11/tables/0/rows/4/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server.", "/versions/11/tables/0/rows/5/summary": "Do not display progress messages.", "/versions/11/tables/0/rows/6/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/11/tables/0/rows/7/summary": "Print detailed information during processing.", "/versions/11/tables/0/rows/8/summary": "Print the vacuumdb version and exit.", "/versions/11/tables/0/rows/9/summary": "Also calculate statistics for use by the optimizer.", "/versions/11/tables/0/columns/0/label": "Option and arguments", "/versions/11/tables/0/columns/1/label": "Description", "/versions/11/tables/0/rows/10/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/11/tables/0/rows/11/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster.", "/versions/11/tables/0/rows/12/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/11/tables/0/rows/13/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/11/tables/0/rows/14/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/11/tables/0/rows/15/summary": "User name to connect as.", "/versions/11/tables/0/rows/16/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/11/tables/0/rows/17/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/11/tables/0/rows/18/summary": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/11/tables/1/columns/0/label": "Variable", "/versions/11/tables/1/columns/1/label": "Meaning", "/versions/11/tables/1/rows/0/description": "Default connection parameters"}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "60558f755082e2bf0c1732edf39aa9be8413ca4be31a83cac2ae578041294fe5"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster. This option is useful to analyze a database that was newly populated from a restored dump or by pg_upgrade . This option will try to create some statistics as fast as possible, to make the database usable, and then produce full statistics in the subsequent stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}]}, "comparison_hash": "1e4dee8b319815c534ef0dabb5a7b059bd916205ae64c2fde59591b0d20c3c56", "manual_language": "zh"}, "12": {"facts": [{"label": "\u624b\u518c\u4e2d\u7684\u53ef\u6267\u884c\u7a0b\u5e8f", "value": "vacuumdb"}, {"label": "\u7a0b\u5e8f\u7248\u672c", "value": "12.22"}, {"label": "\u53c2\u8003\u6e05\u5355", "value": "\u5ba2\u6237\u7aef\u7a0b\u5e8f"}, {"label": "\u9009\u9879\u5b9a\u4e49\u7ec4", "value": "23"}], "tables": [{"key": "options", "rows": [{"summary": "\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-a --all"}}, {"summary": "\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "--disable-page-skipping"}}, {"summary": "\u56de\u663e vacuumdb \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-e --echo"}}, {"summary": "\u6267\u884c \u201c \u5b8c\u5168 \u201d \u6e05\u7406\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-f --full"}}, {"summary": "\u6fc0\u8fdb\u5730 \u201c \u51bb\u7ed3 \u201d \u5143\u7ec4\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-F --freeze"}}, {"summary": "\u901a\u8fc7\u540c\u65f6\u8fd0\u884c njobs \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-j njobs --jobs= njobs"}}, {"summary": "\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a mxid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5.1 \u8282 \uff09\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "--min-mxid-age mxid_age"}}, {"summary": "\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a xid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5 \u8282 \uff09\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "--min-xid-age xid_age"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "--skip-locked"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\uff0c\u7c7b\u4f3c --analyze-only \u3002\u4f7f\u7528\u4e0d\u540c\u7684\u914d\u7f6e\u8bbe\u7f6e\u8fd0\u884c\u591a\u4e2a\uff08\u76ee\u524d\u4e3a\u4e09\u4e2a\uff09\u5206\u6790\u9636\u6bb5\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/12/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}, {"name": "PG_COLOR", "description": "\u6307\u5b9a\u662f\u5426\u5728\u8bca\u65ad\u6d88\u606f\u4e2d\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a always \u3001 auto \u548c never \u3002"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/12/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["--disable-page-skipping"], "summary": "Disable skipping pages based on the contents of the visibility map.", "signature": "--disable-page-skipping", "source_url": "/docs/12/app-vacuumdb.html", "description": "Disable skipping pages based on the contents of the visibility map. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/12/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/12/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/12/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/12/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "signature": "--min-mxid-age mxid_age", "source_url": "/docs/12/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--min-xid-age xid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "signature": "--min-xid-age xid_age", "source_url": "/docs/12/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/12/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "summary": "Skip relations that cannot be immediately locked for processing.", "signature": "--skip-locked", "source_url": "/docs/12/app-vacuumdb.html", "description": "Skip relations that cannot be immediately locked for processing. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/12/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/12/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/12/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/12/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/12/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster.", "signature": "--analyze-in-stages", "source_url": "/docs/12/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster. This option is useful to analyze a database that was newly populated from a restored dump or by pg_upgrade . This option will try to create some statistics as fast as possible, to make the database usable, and then produce full statistics in the subsequent stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/12/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/12/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/12/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/12/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/12/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/12/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/12/app-vacuumdb.html", "description": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/source/v12.22/postgresql-12.22.tar.bz2", "label": "12.22", "major": "12", "channel": "historical", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/12/postgresql-12-A4.pdf", "bytes": 13424351, "pages": 2803, "sha256": "7422cf53fd1939e7a3d2925231a88b0330e468afa5393627cac0ff86158a0621", "built_at": "2026-09-26"}, "US": {"url": "/files/documentation/pdf/12/postgresql-12-US.pdf", "bytes": 13322565, "pages": 2958, "sha256": "51f3b04e72907fc38512685946223452ea65f84419c60c66241dfa3396035e77", "built_at": "2026-09-26"}}, "tree": "12", "index": "index.html", "major": "12", "pages": 1131, "release": "12.22", "source_url": "https://ftp.postgresql.org/pub/source/v12.22/postgresql-12.22.tar.bz2", "svg_assets": 2, "source_mode": "en HTML verified against the pinned official archive", "source_sha256": "8df3c0474782589d3c6f374b5133b1bd14d168086edbc13c6e72e67dd4527a3b"}, "revision": "7a827e97cbfacd7febff75f34443e2043e40723de5b6d8c9d81a9430b65a37e4", "evidence_kind": "English manual and source declarations", "source_sha256": "8df3c0474782589d3c6f374b5133b1bd14d168086edbc13c6e72e67dd4527a3b"}, "sources": [{"url": "https://pg.center/docs/12/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "12.22 English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "96c1f0d988bea52f9bb60f37c6e558d8379be7dd0e90089cfca03dc95cccade5", "language": "en", "original_url": "/docs/12/app-vacuumdb.html"}, {"url": "https://pg.center/docs/12/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "089624dd131f52eea682b304f87a1acb03392ee7bcf78b000699c9b17c7ca22d", "language": "en", "original_url": "/docs/12/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]\nvacuumdb [ connection-option ...] [ option ...] -a | --all", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.20.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [<em class=\"replaceable\"><code>dbname</code></em>]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.20.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] <code class=\"option\">-a</code> | <code class=\"option\">--all</code></p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f SQL \u547d\u4ee4<a class=\"xref\" href=\"/docs/12/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/12/libpq.html#LIBPQ-CONNSTRING\" title=\"33.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--disable-page-skipping</code></span></dt>\n<dd>\n<p lang=\"zh\">\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/12/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u53d1\u751f\u6b7b\u9501\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-mxid-age <em class=\"replaceable\"><code>mxid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>mxid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/12/maintenance.html#VACUUM-FOR-MULTIXACT-WRAPAROUND\" title=\"24.1.5.1.\u00a0\u591a\u4e8b\u52a1\u4e0e\u56de\u5377\">\u7b2c\u00a024.1.5.1\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u591a\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-xid-age <em class=\"replaceable\"><code>xid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>xid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/12/maintenance.html#VACUUM-FOR-WRAPAROUND\" title=\"24.1.5.\u00a0\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\u5931\u8d25\">\u7b2c\u00a024.1.5\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--skip-locked</code></span></dt>\n<dd>\n<p lang=\"zh\">\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 12 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\uff0c\u7c7b\u4f3c<code class=\"option\">--analyze-only</code>\u3002\u4f7f\u7528\u4e0d\u540c\u7684\u914d\u7f6e\u8bbe\u7f6e\u8fd0\u884c\u591a\u4e2a\uff08\u76ee\u524d\u4e3a\u4e09\u4e2a\uff09\u5206\u6790\u9636\u6bb5\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u9002\u5408\u5206\u6790\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u6216<code class=\"command\">pg_upgrade</code>\u586b\u5145\u7684\u6570\u636e\u5e93\u3002\u5b83\u4f1a\u5c3d\u5feb\u5c1d\u8bd5\u751f\u6210\u4e00\u4e9b\u7edf\u8ba1\u4fe1\u606f\uff0c\u8ba9\u6570\u636e\u5e93\u80fd\u591f\u4f7f\u7528\uff0c\u7136\u540e\u5728\u540e\u7eed\u9636\u6bb5\u751f\u6210\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/12/libpq.html#LIBPQ-CONNSTRING\" title=\"33.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"envar\">PG_COLOR</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u662f\u5426\u5728\u8bca\u65ad\u6d88\u606f\u4e2d\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a <code class=\"literal\">always</code>\u3001<code class=\"literal\">auto</code> \u548c <code class=\"literal\">never</code>\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/12/libpq-envars.html\" title=\"33.14.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a033.14\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u9047\u56f0\u96be\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/12/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/12/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span> \u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u4e5f\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.9\">\n<h2 lang=\"zh\">\u6ce8\u89e3</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u53ef\u80fd\u9700\u8981\u591a\u6b21\u8fde\u63a5\u5230<span class=\"productname\">PostgreSQL</span>\u670d\u52a1\u5668\uff0c\u6bcf\u6b21\u90fd\u8981\u8be2\u95ee\u5bc6\u7801\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528<code class=\"filename\">~/.pgpass</code>\u6587\u4ef6\u4f1a\u6bd4\u8f83\u65b9\u4fbf\u3002\u66f4\u591a\u4fe1\u606f\u89c1<a class=\"xref\" href=\"/docs/12/libpq-pgpass.html\" title=\"33.15.\u00a0\u5bc6\u7801\u6587\u4ef6\">\u7b2c\u00a033.15\u00a0\u8282</a>\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.10\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.20.11\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2><span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/12/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span>\n</div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/12/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "2020b18f4e773429c25e124fd9374dd8dcc18685e77771c088e367d1a18247e7", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[10]/h2[0]", "#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[29]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[31]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[35]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[0]", 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"/versions/12/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/12/tables/0/rows/1/summary": "Disable skipping pages based on the contents of the visibility map.", "/versions/12/tables/0/rows/2/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/12/tables/0/rows/3/summary": "Perform \u201c full \u201d vacuuming.", "/versions/12/tables/0/rows/4/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/12/tables/0/rows/5/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server.", "/versions/12/tables/0/rows/6/summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "/versions/12/tables/0/rows/7/summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "/versions/12/tables/0/rows/8/summary": "Do not display progress messages.", "/versions/12/tables/0/rows/9/summary": "Skip relations that cannot be immediately locked for processing.", "/versions/12/tables/0/columns/0/label": "Option and arguments", "/versions/12/tables/0/columns/1/label": "Description", "/versions/12/tables/0/rows/10/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/12/tables/0/rows/11/summary": "Print detailed information during processing.", "/versions/12/tables/0/rows/12/summary": "Print the vacuumdb version and exit.", "/versions/12/tables/0/rows/13/summary": "Also calculate statistics for use by the optimizer.", "/versions/12/tables/0/rows/14/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/12/tables/0/rows/15/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster.", "/versions/12/tables/0/rows/16/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/12/tables/0/rows/17/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/12/tables/0/rows/18/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/12/tables/0/rows/19/summary": "User name to connect as.", "/versions/12/tables/0/rows/20/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/12/tables/0/rows/21/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/12/tables/0/rows/22/summary": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/12/tables/1/columns/0/label": "Variable", "/versions/12/tables/1/columns/1/label": "Meaning", "/versions/12/tables/1/rows/0/description": "Default connection parameters", "/versions/12/tables/1/rows/1/description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "2e1feb842bc80f2b0bdb0b2e4063a47920291950c7eba31d8827e8801690404c"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["--disable-page-skipping"], "signature": "--disable-page-skipping", "description": "Disable skipping pages based on the contents of the visibility map. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option reduces the time of the processing but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "signature": "--min-mxid-age mxid_age", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--min-xid-age xid_age"], "signature": "--min-xid-age xid_age", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "signature": "--skip-locked", "description": "Skip relations that cannot be immediately locked for processing. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster. This option is useful to analyze a database that was newly populated from a restored dump or by pg_upgrade . This option will try to create some statistics as fast as possible, to make the database usable, and then produce full statistics in the subsequent stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "Specifies the name of the database to connect to to discover which databases should be vacuumed, when -a / --all is used. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... 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Possible values are always , auto and never ."}]}, "comparison_hash": "cbe86a31feee22415657dfe0f7848759b1cd124df04ee3f2752356502f47a4d1", "manual_language": "zh"}, "13": {"facts": [{"label": "\u624b\u518c\u4e2d\u7684\u53ef\u6267\u884c\u7a0b\u5e8f", "value": "vacuumdb"}, {"label": "\u7a0b\u5e8f\u7248\u672c", "value": "13.23"}, {"label": "\u53c2\u8003\u6e05\u5355", "value": "\u5ba2\u6237\u7aef\u7a0b\u5e8f"}, {"label": "\u9009\u9879\u5b9a\u4e49\u7ec4", "value": "24"}], "tables": [{"key": "options", "rows": [{"summary": "\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-a --all"}}, {"summary": "\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "--disable-page-skipping"}}, {"summary": "\u56de\u663e vacuumdb \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-e --echo"}}, {"summary": "\u6267\u884c \u201c \u5b8c\u5168 \u201d \u6e05\u7406\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-f --full"}}, {"summary": "\u6fc0\u8fdb\u5730 \u201c \u51bb\u7ed3 \u201d \u5143\u7ec4\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-F --freeze"}}, {"summary": "\u901a\u8fc7\u540c\u65f6\u8fd0\u884c njobs \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-j njobs --jobs= njobs"}}, {"summary": "\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a mxid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5.1 \u8282 \uff09\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "--min-mxid-age mxid_age"}}, {"summary": "\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a xid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5 \u8282 \uff09\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "--min-xid-age xid_age"}}, {"summary": "\u6307\u5b9a \u5e76\u884c\u6e05\u7406 \u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-P parallel_workers --parallel= parallel_workers"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "--skip-locked"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\uff0c\u7c7b\u4f3c --analyze-only \u3002\u4f7f\u7528\u4e0d\u540c\u7684\u914d\u7f6e\u8bbe\u7f6e\u8fd0\u884c\u591a\u4e2a\uff08\u76ee\u524d\u4e3a\u4e09\u4e2a\uff09\u5206\u6790\u9636\u6bb5\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/13/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}, {"name": "PG_COLOR", "description": "\u6307\u5b9a\u662f\u5426\u5728\u8bca\u65ad\u6d88\u606f\u4e2d\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a always \u3001 auto \u548c never \u3002"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/13/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["--disable-page-skipping"], "summary": "Disable skipping pages based on the contents of the visibility map.", "signature": "--disable-page-skipping", "source_url": "/docs/13/app-vacuumdb.html", "description": "Disable skipping pages based on the contents of the visibility map. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/13/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/13/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/13/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/13/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "signature": "--min-mxid-age mxid_age", "source_url": "/docs/13/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--min-xid-age xid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "signature": "--min-xid-age xid_age", "source_url": "/docs/13/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "signature": "-P parallel_workers --parallel= parallel_workers", "source_url": "/docs/13/app-vacuumdb.html", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM . Note This option is only available for servers running PostgreSQL 13 and later."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/13/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "summary": "Skip relations that cannot be immediately locked for processing.", "signature": "--skip-locked", "source_url": "/docs/13/app-vacuumdb.html", "description": "Skip relations that cannot be immediately locked for processing. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/13/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/13/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/13/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/13/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/13/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster.", "signature": "--analyze-in-stages", "source_url": "/docs/13/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster. This option is useful to analyze a database that was newly populated from a restored dump or by pg_upgrade . This option will try to create some statistics as fast as possible, to make the database usable, and then produce full statistics in the subsequent stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/13/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/13/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/13/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/13/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/13/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/13/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/13/app-vacuumdb.html", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/source/v13.23/postgresql-13.23.tar.bz2", "label": "13.23", "major": "13", "channel": "historical", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/13/postgresql-13-A4.pdf", "bytes": 13843239, "pages": 2826, "sha256": "171cc09f90936dbc1cbd503a98ff07ae72ea58ab9771ff051313f1217737799c", "built_at": "2026-09-26"}, "US": {"url": "/files/documentation/pdf/13/postgresql-13-US.pdf", "bytes": 13739572, "pages": 2984, "sha256": "48d09c6e197d9db4220f41afe83efe848a8661b1b168d3b89419751ecaf6c24d", "built_at": "2026-09-26"}}, "tree": "13", "index": "index.html", "major": "13", "pages": 1139, "release": "13.23", "source_url": "https://ftp.postgresql.org/pub/source/v13.23/postgresql-13.23.tar.bz2", "svg_assets": 3, "source_mode": "en HTML verified against the pinned official archive", "source_sha256": "6ec3c82726af92b7dec873fa1cdf881eca92a4219787dfad05acb6b10e041fd6"}, "revision": "614ee3133270254e476c118cdf6f72af78d4e4b8bbd9b28ed9ab1e14e4e9c0f6", "evidence_kind": "English manual and source declarations", "source_sha256": "6ec3c82726af92b7dec873fa1cdf881eca92a4219787dfad05acb6b10e041fd6"}, "sources": [{"url": "https://pg.center/docs/13/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "13.23 English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "044ece9573d533f7700a943bb1d526826953105e27530c993214de75067895aa", "language": "en", "original_url": "/docs/13/app-vacuumdb.html"}, {"url": "https://pg.center/docs/13/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "2a16c2982d9803edd4bd6920f76b66083e7f2959182d6a3bcec7ccfbac0a9ad8", "language": "en", "original_url": "/docs/13/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]\nvacuumdb [ connection-option ...] [ option ...] -a | --all", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.21.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [<em class=\"replaceable\"><code>dbname</code></em>]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.21.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] <code class=\"option\">-a</code> | <code class=\"option\">--all</code></p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.21.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f SQL \u547d\u4ee4<a class=\"xref\" href=\"/docs/13/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.21.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/13/libpq.html#LIBPQ-CONNSTRING\" title=\"33.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--disable-page-skipping</code></span></dt>\n<dd>\n<p lang=\"zh\">\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/13/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u53d1\u751f\u6b7b\u9501\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-mxid-age <em class=\"replaceable\"><code>mxid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>mxid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/13/maintenance.html#VACUUM-FOR-MULTIXACT-WRAPAROUND\" title=\"24.1.5.1.\u00a0\u591a\u4e8b\u52a1\u4e0e\u56de\u5377\">\u7b2c\u00a024.1.5.1\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u591a\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-xid-age <em class=\"replaceable\"><code>xid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>xid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/13/maintenance.html#VACUUM-FOR-WRAPAROUND\" title=\"24.1.5.\u00a0\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\u5931\u8d25\">\u7b2c\u00a024.1.5\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-P <em class=\"replaceable\"><code>parallel_workers</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--parallel=<em class=\"replaceable\"><code>parallel_workers</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u6307\u5b9a<em class=\"firstterm\">\u5e76\u884c\u6e05\u7406</em>\u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/13/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 13 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--skip-locked</code></span></dt>\n<dd>\n<p lang=\"zh\">\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 12 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\uff0c\u7c7b\u4f3c<code class=\"option\">--analyze-only</code>\u3002\u4f7f\u7528\u4e0d\u540c\u7684\u914d\u7f6e\u8bbe\u7f6e\u8fd0\u884c\u591a\u4e2a\uff08\u76ee\u524d\u4e3a\u4e09\u4e2a\uff09\u5206\u6790\u9636\u6bb5\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u9002\u5408\u5206\u6790\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u6216<code class=\"command\">pg_upgrade</code>\u586b\u5145\u7684\u6570\u636e\u5e93\u3002\u5b83\u4f1a\u5c3d\u5feb\u5c1d\u8bd5\u751f\u6210\u4e00\u4e9b\u7edf\u8ba1\u4fe1\u606f\uff0c\u8ba9\u6570\u636e\u5e93\u80fd\u591f\u4f7f\u7528\uff0c\u7136\u540e\u5728\u540e\u7eed\u9636\u6bb5\u751f\u6210\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/13/libpq.html#LIBPQ-CONNSTRING\" title=\"33.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.21.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"envar\">PG_COLOR</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u662f\u5426\u5728\u8bca\u65ad\u6d88\u606f\u4e2d\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a <code class=\"literal\">always</code>\u3001<code class=\"literal\">auto</code> \u548c <code class=\"literal\">never</code>\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/13/libpq-envars.html\" title=\"33.14.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a033.14\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.21.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u9047\u56f0\u96be\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/13/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/13/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span> \u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u4e5f\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.21.9\">\n<h2 lang=\"zh\">\u6ce8\u89e3</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u53ef\u80fd\u9700\u8981\u591a\u6b21\u8fde\u63a5\u5230<span class=\"productname\">PostgreSQL</span>\u670d\u52a1\u5668\uff0c\u6bcf\u6b21\u90fd\u8981\u8be2\u95ee\u5bc6\u7801\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528<code class=\"filename\">~/.pgpass</code>\u6587\u4ef6\u4f1a\u6bd4\u8f83\u65b9\u4fbf\u3002\u66f4\u591a\u4fe1\u606f\u89c1<a class=\"xref\" href=\"/docs/13/libpq-pgpass.html\" title=\"33.15.\u00a0\u5bc6\u7801\u6587\u4ef6\">\u7b2c\u00a033.15\u00a0\u8282</a>\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.21.10\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.21.11\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2><span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/13/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span>\n</div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/13/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "747439f3fcd98e708f0261b9b0e60568dea0eee47812513922e58f878156cda9", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[10]/h2[0]", "#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[29]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[31]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[35]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[35]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[37]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[0]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[1]", "#APP-VACUUMDB/div[5]/p[1]", "#APP-VACUUMDB/div[5]/p[3]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[1]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[3]", "#APP-VACUUMDB/div[6]/h2[0]", "#APP-VACUUMDB/div[6]/p[2]", "#APP-VACUUMDB/div[7]/h2[0]", "#APP-VACUUMDB/div[7]/p[1]", "#APP-VACUUMDB/div[8]/h2[0]", "#APP-VACUUMDB/div[8]/p[1]", "#APP-VACUUMDB/div[9]/h2[0]", "#APP-VACUUMDB/div[9]/p[1]", "#APP-VACUUMDB/div[9]/p[3]"]}], "language": "zh", "original_text": {"/versions/13/description/0": "vacuumdb \u2014 garbage-collect and analyze a PostgreSQL database", "/versions/13/facts/0/label": "Documented executable", "/versions/13/facts/1/label": "Executable version", "/versions/13/facts/2/label": "Reference inventory", "/versions/13/facts/2/value": "Client applications", "/versions/13/facts/3/label": "Option definition groups", "/versions/13/tables/0/title": "Documented options", "/versions/13/tables/1/title": "Environment variables", "/versions/13/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/13/tables/0/rows/1/summary": "Disable skipping pages based on the contents of the visibility map.", "/versions/13/tables/0/rows/2/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/13/tables/0/rows/3/summary": "Perform \u201c full \u201d vacuuming.", "/versions/13/tables/0/rows/4/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/13/tables/0/rows/5/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "/versions/13/tables/0/rows/6/summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "/versions/13/tables/0/rows/7/summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "/versions/13/tables/0/rows/8/summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "/versions/13/tables/0/rows/9/summary": "Do not display progress messages.", "/versions/13/tables/0/columns/0/label": "Option and arguments", "/versions/13/tables/0/columns/1/label": "Description", "/versions/13/tables/0/rows/10/summary": "Skip relations that cannot be immediately locked for processing.", "/versions/13/tables/0/rows/11/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/13/tables/0/rows/12/summary": "Print detailed information during processing.", "/versions/13/tables/0/rows/13/summary": "Print the vacuumdb version and exit.", "/versions/13/tables/0/rows/14/summary": "Also calculate statistics for use by the optimizer.", "/versions/13/tables/0/rows/15/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/13/tables/0/rows/16/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster.", "/versions/13/tables/0/rows/17/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/13/tables/0/rows/18/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/13/tables/0/rows/19/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/13/tables/0/rows/20/summary": "User name to connect as.", "/versions/13/tables/0/rows/21/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/13/tables/0/rows/22/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/13/tables/0/rows/23/summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/13/tables/1/columns/0/label": "Variable", "/versions/13/tables/1/columns/1/label": "Meaning", "/versions/13/tables/1/rows/0/description": "Default connection parameters", "/versions/13/tables/1/rows/1/description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "24328ef4829e242b670ea79c159212ed2242818aba86ac3ed674d2deeab12ea0"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["--disable-page-skipping"], "signature": "--disable-page-skipping", "description": "Disable skipping pages based on the contents of the visibility map. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "signature": "--min-mxid-age mxid_age", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--min-xid-age xid_age"], "signature": "--min-xid-age xid_age", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "signature": "-P parallel_workers --parallel= parallel_workers", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM . Note This option is only available for servers running PostgreSQL 13 and later."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "signature": "--skip-locked", "description": "Skip relations that cannot be immediately locked for processing. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster. This option is useful to analyze a database that was newly populated from a restored dump or by pg_upgrade . This option will try to create some statistics as fast as possible, to make the database usable, and then produce full statistics in the subsequent stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}]}, "comparison_hash": "62f25007c905fb6eceac3fae58ed492a2f18024c2778fbd52cfdbf033f123961", "manual_language": "zh"}, "14": {"facts": [{"label": "\u624b\u518c\u4e2d\u7684\u53ef\u6267\u884c\u7a0b\u5e8f", "value": "vacuumdb"}, {"label": "\u7a0b\u5e8f\u7248\u672c", "value": "14.24"}, {"label": "\u53c2\u8003\u6e05\u5355", "value": "\u5ba2\u6237\u7aef\u7a0b\u5e8f"}, {"label": "\u9009\u9879\u5b9a\u4e49\u7ec4", "value": "28"}], "tables": [{"key": "options", "rows": [{"summary": "\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-a --all"}}, {"summary": "\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "--disable-page-skipping"}}, {"summary": "\u56de\u663e vacuumdb \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-e --echo"}}, {"summary": "\u6267\u884c \u201c \u5b8c\u5168 \u201d \u6e05\u7406\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-f --full"}}, {"summary": "\u6fc0\u8fdb\u5730 \u201c \u51bb\u7ed3 \u201d \u5143\u7ec4\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-F --freeze"}}, {"summary": "\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "--force-index-cleanup"}}, {"summary": "\u901a\u8fc7\u540c\u65f6\u8fd0\u884c njobs \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-j njobs --jobs= njobs"}}, {"summary": "\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a mxid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 25.1.5.1 \u8282 \uff09\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "--min-mxid-age mxid_age"}}, {"summary": "\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a xid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 25.1.5 \u8282 \uff09\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "--min-xid-age xid_age"}}, {"summary": "\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "--no-index-cleanup"}}, {"summary": "\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "--no-process-toast"}}, {"summary": "\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "--no-truncate"}}, {"summary": "\u6307\u5b9a \u5e76\u884c\u6e05\u7406 \u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-P parallel_workers --parallel= parallel_workers"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "--skip-locked"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\uff0c\u7c7b\u4f3c --analyze-only \u3002\u4f7f\u7528\u4e0d\u540c\u7684\u914d\u7f6e\u8bbe\u7f6e\u8fd0\u884c\u591a\u4e2a\uff08\u76ee\u524d\u4e3a\u4e09\u4e2a\uff09\u5206\u6790\u9636\u6bb5\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/14/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}, {"name": "PG_COLOR", "description": "\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a always \u3001 auto \u548c never \u3002"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/14/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["--disable-page-skipping"], "summary": "Disable skipping pages based on the contents of the visibility map.", "signature": "--disable-page-skipping", "source_url": "/docs/14/app-vacuumdb.html", "description": "Disable skipping pages based on the contents of the visibility map. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/14/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/14/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/14/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "summary": "Always remove index entries pointing to dead tuples.", "signature": "--force-index-cleanup", "source_url": "/docs/14/app-vacuumdb.html", "description": "Always remove index entries pointing to dead tuples. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/14/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ).", "signature": "--min-mxid-age mxid_age", "source_url": "/docs/14/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--min-xid-age xid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ).", "signature": "--min-xid-age xid_age", "source_url": "/docs/14/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--no-index-cleanup"], "summary": "Do not remove index entries pointing to dead tuples.", "signature": "--no-index-cleanup", "source_url": "/docs/14/app-vacuumdb.html", "description": "Do not remove index entries pointing to dead tuples. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["--no-process-toast"], "summary": "Skip the TOAST table associated with the table to vacuum, if any.", "signature": "--no-process-toast", "source_url": "/docs/14/app-vacuumdb.html", "description": "Skip the TOAST table associated with the table to vacuum, if any. Note This option is only available for servers running PostgreSQL 14 and later."}, {"names": ["--no-truncate"], "summary": "Do not truncate empty pages at the end of the table.", "signature": "--no-truncate", "source_url": "/docs/14/app-vacuumdb.html", "description": "Do not truncate empty pages at the end of the table. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "signature": "-P parallel_workers --parallel= parallel_workers", "source_url": "/docs/14/app-vacuumdb.html", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM . Note This option is only available for servers running PostgreSQL 13 and later."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/14/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "summary": "Skip relations that cannot be immediately locked for processing.", "signature": "--skip-locked", "source_url": "/docs/14/app-vacuumdb.html", "description": "Skip relations that cannot be immediately locked for processing. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/14/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/14/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/14/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/14/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/14/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster.", "signature": "--analyze-in-stages", "source_url": "/docs/14/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster. This option is useful to analyze a database that was newly populated from a restored dump or by pg_upgrade . This option will try to create some statistics as fast as possible, to make the database usable, and then produce full statistics in the subsequent stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/14/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/14/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/14/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/14/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/14/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/14/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/14/app-vacuumdb.html", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/source/v14.24/postgresql-14.24.tar.bz2", "label": "14.24", "major": "14", "channel": "stable", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/14/postgresql-14-A4.pdf", "bytes": 14354704, "pages": 2944, "sha256": "8bc6b9dd7b246888bb77f0a5e8c39a2eae52e9926569832669c7d1600becb27c", "built_at": "2026-09-26"}, "US": {"url": "/files/documentation/pdf/14/postgresql-14-US.pdf", "bytes": 14242178, "pages": 3102, "sha256": "b7ecb5a5f62d8b9f73a69e25a7d26ba285373bc53168a553bff7b77955506db4", "built_at": "2026-09-26"}}, "tree": "14", "index": "index.html", "major": "14", "pages": 1158, "release": "14.24", "source_url": "https://ftp.postgresql.org/pub/source/v14.24/postgresql-14.24.tar.bz2", "svg_assets": 3, "source_mode": "en HTML verified against the pinned official archive", "source_sha256": "a7fa7ed3d558172355f51406097a7bd4f6b473be80f311ef7cda96bf383d8897"}, "revision": "588700d46356d8837c77c7c0a4e71e645fe6535983b8f1830aa8f2e4e41c40ae", "evidence_kind": "English manual and source declarations", "source_sha256": "a7fa7ed3d558172355f51406097a7bd4f6b473be80f311ef7cda96bf383d8897"}, "sources": [{"url": "https://pg.center/docs/14/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "14.24 English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "a2fcd5570b931255d80ec6ec582b2f9270d30c49009a4f0640fe647720d6e8d9", "language": "en", "original_url": "/docs/14/app-vacuumdb.html"}, {"url": "https://pg.center/docs/14/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "5a13567a052954dfe494dfaab9f50919faa1ae56023930fdbb78d45e53feccde", "language": "en", "original_url": "/docs/14/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]\nvacuumdb [ connection-option ...] [ option ...] -a | --all", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.22.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [<em class=\"replaceable\"><code>dbname</code></em>]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.22.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] <code class=\"option\">-a</code> | <code class=\"option\">--all</code></p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f SQL \u547d\u4ee4 <a class=\"link\" href=\"/docs/14/sql-vacuum.html\" title=\"VACUUM\"><code class=\"command\">VACUUM</code></a> \u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/14/libpq.html#LIBPQ-CONNSTRING\" title=\"34.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--disable-page-skipping</code></span></dt>\n<dd>\n<p lang=\"zh\">\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--force-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 12 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/14/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u56e0\u6b7b\u9501\u800c\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-mxid-age <em class=\"replaceable\"><code>mxid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>mxid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/14/maintenance.html#VACUUM-FOR-MULTIXACT-WRAPAROUND\" title=\"25.1.5.1.\u00a0\u591a\u4e8b\u52a1\u4e0e\u56de\u5377\">\u7b2c\u00a025.1.5.1\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u591a\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-xid-age <em class=\"replaceable\"><code>xid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>xid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/14/maintenance.html#VACUUM-FOR-WRAPAROUND\" title=\"25.1.5.\u00a0\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\u5931\u8d25\">\u7b2c\u00a025.1.5\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 12 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-toast</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 14 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-truncate</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 12 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-P <em class=\"replaceable\"><code>parallel_workers</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--parallel=<em class=\"replaceable\"><code>parallel_workers</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u6307\u5b9a<em class=\"firstterm\">\u5e76\u884c\u6e05\u7406</em>\u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/14/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 13 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--skip-locked</code></span></dt>\n<dd>\n<p lang=\"zh\">\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 12 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\uff0c\u7c7b\u4f3c<code class=\"option\">--analyze-only</code>\u3002\u4f7f\u7528\u4e0d\u540c\u7684\u914d\u7f6e\u8bbe\u7f6e\u8fd0\u884c\u591a\u4e2a\uff08\u76ee\u524d\u4e3a\u4e09\u4e2a\uff09\u5206\u6790\u9636\u6bb5\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u9002\u5408\u5206\u6790\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u6216<code class=\"command\">pg_upgrade</code>\u586b\u5145\u7684\u6570\u636e\u5e93\u3002\u5b83\u4f1a\u5c3d\u5feb\u5c1d\u8bd5\u751f\u6210\u4e00\u4e9b\u7edf\u8ba1\u4fe1\u606f\uff0c\u8ba9\u6570\u636e\u5e93\u80fd\u591f\u4f7f\u7528\uff0c\u7136\u540e\u5728\u540e\u7eed\u9636\u6bb5\u751f\u6210\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/14/libpq.html#LIBPQ-CONNSTRING\" title=\"34.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"envar\">PG_COLOR</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a <code class=\"literal\">always</code>\u3001<code class=\"literal\">auto</code>\u548c <code class=\"literal\">never</code>\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/14/libpq-envars.html\" title=\"34.15.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a034.15\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u679c\u9047\u5230\u95ee\u9898\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/14/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/14/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span>\u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.9\">\n<h2 lang=\"zh\">\u6ce8\u89e3</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u53ef\u80fd\u9700\u8981\u591a\u6b21\u8fde\u63a5\u5230<span class=\"productname\">PostgreSQL</span>\u670d\u52a1\u5668\uff0c\u6bcf\u6b21\u90fd\u8981\u8be2\u95ee\u5bc6\u7801\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528<code class=\"filename\">~/.pgpass</code>\u6587\u4ef6\u4f1a\u6bd4\u8f83\u65b9\u4fbf\u3002\u66f4\u591a\u4fe1\u606f\u89c1<a class=\"xref\" href=\"/docs/14/libpq-pgpass.html\" title=\"34.16.\u00a0\u5bc6\u7801\u6587\u4ef6\">\u7b2c\u00a034.16\u00a0\u8282</a>\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.10\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.11\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2><span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/14/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span>\n</div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/14/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "107f015e498f295748273922448f698458beaf42dec18df96149f546512e5436", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[10]/h2[0]", "#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[29]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[31]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[35]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[37]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[39]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[41]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[0]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[1]", "#APP-VACUUMDB/div[5]/p[1]", "#APP-VACUUMDB/div[5]/p[3]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[1]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[3]", "#APP-VACUUMDB/div[6]/h2[0]", "#APP-VACUUMDB/div[6]/p[2]", "#APP-VACUUMDB/div[7]/h2[0]", "#APP-VACUUMDB/div[7]/p[1]", "#APP-VACUUMDB/div[8]/h2[0]", "#APP-VACUUMDB/div[8]/p[1]", "#APP-VACUUMDB/div[9]/h2[0]", "#APP-VACUUMDB/div[9]/p[1]", "#APP-VACUUMDB/div[9]/p[3]"]}], "language": "zh", "original_text": {"/versions/14/description/0": "vacuumdb \u2014 garbage-collect and analyze a PostgreSQL database", "/versions/14/facts/0/label": "Documented executable", "/versions/14/facts/1/label": "Executable version", "/versions/14/facts/2/label": "Reference inventory", "/versions/14/facts/2/value": "Client applications", "/versions/14/facts/3/label": "Option definition groups", "/versions/14/tables/0/title": "Documented options", "/versions/14/tables/1/title": "Environment variables", "/versions/14/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/14/tables/0/rows/1/summary": "Disable skipping pages based on the contents of the visibility map.", "/versions/14/tables/0/rows/2/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/14/tables/0/rows/3/summary": "Perform \u201c full \u201d vacuuming.", "/versions/14/tables/0/rows/4/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/14/tables/0/rows/5/summary": "Always remove index entries pointing to dead tuples.", "/versions/14/tables/0/rows/6/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "/versions/14/tables/0/rows/7/summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ).", "/versions/14/tables/0/rows/8/summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ).", "/versions/14/tables/0/rows/9/summary": "Do not remove index entries pointing to dead tuples.", "/versions/14/tables/0/columns/0/label": "Option and arguments", "/versions/14/tables/0/columns/1/label": "Description", "/versions/14/tables/0/rows/10/summary": "Skip the TOAST table associated with the table to vacuum, if any.", "/versions/14/tables/0/rows/11/summary": "Do not truncate empty pages at the end of the table.", "/versions/14/tables/0/rows/12/summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "/versions/14/tables/0/rows/13/summary": "Do not display progress messages.", "/versions/14/tables/0/rows/14/summary": "Skip relations that cannot be immediately locked for processing.", "/versions/14/tables/0/rows/15/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/14/tables/0/rows/16/summary": "Print detailed information during processing.", "/versions/14/tables/0/rows/17/summary": "Print the vacuumdb version and exit.", "/versions/14/tables/0/rows/18/summary": "Also calculate statistics for use by the optimizer.", "/versions/14/tables/0/rows/19/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/14/tables/0/rows/20/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster.", "/versions/14/tables/0/rows/21/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/14/tables/0/rows/22/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/14/tables/0/rows/23/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/14/tables/0/rows/24/summary": "User name to connect as.", "/versions/14/tables/0/rows/25/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/14/tables/0/rows/26/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/14/tables/0/rows/27/summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/14/tables/1/columns/0/label": "Variable", "/versions/14/tables/1/columns/1/label": "Meaning", "/versions/14/tables/1/rows/0/description": "Default connection parameters", "/versions/14/tables/1/rows/1/description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "a04bd79cbb219367737308f2f76cce1594510cee40a04a44dd1c8b2ab9c42f49"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["--disable-page-skipping"], "signature": "--disable-page-skipping", "description": "Disable skipping pages based on the contents of the visibility map. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "signature": "--force-index-cleanup", "description": "Always remove index entries pointing to dead tuples. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "signature": "--min-mxid-age mxid_age", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--min-xid-age xid_age"], "signature": "--min-xid-age xid_age", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--no-index-cleanup"], "signature": "--no-index-cleanup", "description": "Do not remove index entries pointing to dead tuples. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["--no-process-toast"], "signature": "--no-process-toast", "description": "Skip the TOAST table associated with the table to vacuum, if any. Note This option is only available for servers running PostgreSQL 14 and later."}, {"names": ["--no-truncate"], "signature": "--no-truncate", "description": "Do not truncate empty pages at the end of the table. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "signature": "-P parallel_workers --parallel= parallel_workers", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM . Note This option is only available for servers running PostgreSQL 13 and later."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "signature": "--skip-locked", "description": "Skip relations that cannot be immediately locked for processing. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run several (currently three) stages of analyze with different configuration settings, to produce usable statistics faster. This option is useful to analyze a database that was newly populated from a restored dump or by pg_upgrade . This option will try to create some statistics as fast as possible, to make the database usable, and then produce full statistics in the subsequent stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}]}, "comparison_hash": "8760d5a5272d8c8a8a63837b59632d12027d423bf1e7b161c89f240a75f3958f", "manual_language": "zh"}, "15": {"facts": [{"label": "\u624b\u518c\u4e2d\u7684\u53ef\u6267\u884c\u7a0b\u5e8f", "value": "vacuumdb"}, {"label": "\u7a0b\u5e8f\u7248\u672c", "value": "15.19"}, {"label": "\u53c2\u8003\u6e05\u5355", "value": "\u5ba2\u6237\u7aef\u7a0b\u5e8f"}, {"label": "\u9009\u9879\u5b9a\u4e49\u7ec4", "value": "28"}], "tables": [{"key": "options", "rows": [{"summary": "\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-a --all"}}, {"summary": "\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "--disable-page-skipping"}}, {"summary": "\u56de\u663e vacuumdb \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-e --echo"}}, {"summary": "\u6267\u884c \u201c \u5b8c\u5168 \u201d \u6e05\u7406\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-f --full"}}, {"summary": "\u6fc0\u8fdb\u5730 \u201c \u51bb\u7ed3 \u201d \u5143\u7ec4\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-F --freeze"}}, {"summary": "\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "--force-index-cleanup"}}, {"summary": "\u901a\u8fc7\u540c\u65f6\u8fd0\u884c njobs \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-j njobs --jobs= njobs"}}, {"summary": "\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a mxid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 25.1.5.1 \u8282 \uff09\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "--min-mxid-age mxid_age"}}, {"summary": "\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a xid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 25.1.5 \u8282 \uff09\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "--min-xid-age xid_age"}}, {"summary": "\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "--no-index-cleanup"}}, {"summary": "\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "--no-process-toast"}}, {"summary": "\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "--no-truncate"}}, {"summary": "\u6307\u5b9a \u5e76\u884c\u6e05\u7406 \u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-P parallel_workers --parallel= parallel_workers"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "--skip-locked"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u7c7b\u4f3c --analyze-only \uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1 default_statistics_target \uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/15/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}, {"name": "PG_COLOR", "description": "\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a always \u3001 auto \u548c never \u3002"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/15/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["--disable-page-skipping"], "summary": "Disable skipping pages based on the contents of the visibility map.", "signature": "--disable-page-skipping", "source_url": "/docs/15/app-vacuumdb.html", "description": "Disable skipping pages based on the contents of the visibility map. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/15/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/15/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/15/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "summary": "Always remove index entries pointing to dead tuples.", "signature": "--force-index-cleanup", "source_url": "/docs/15/app-vacuumdb.html", "description": "Always remove index entries pointing to dead tuples. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/15/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ).", "signature": "--min-mxid-age mxid_age", "source_url": "/docs/15/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--min-xid-age xid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ).", "signature": "--min-xid-age xid_age", "source_url": "/docs/15/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--no-index-cleanup"], "summary": "Do not remove index entries pointing to dead tuples.", "signature": "--no-index-cleanup", "source_url": "/docs/15/app-vacuumdb.html", "description": "Do not remove index entries pointing to dead tuples. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["--no-process-toast"], "summary": "Skip the TOAST table associated with the table to vacuum, if any.", "signature": "--no-process-toast", "source_url": "/docs/15/app-vacuumdb.html", "description": "Skip the TOAST table associated with the table to vacuum, if any. Note This option is only available for servers running PostgreSQL 14 and later."}, {"names": ["--no-truncate"], "summary": "Do not truncate empty pages at the end of the table.", "signature": "--no-truncate", "source_url": "/docs/15/app-vacuumdb.html", "description": "Do not truncate empty pages at the end of the table. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "signature": "-P parallel_workers --parallel= parallel_workers", "source_url": "/docs/15/app-vacuumdb.html", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM . Note This option is only available for servers running PostgreSQL 13 and later."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/15/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "summary": "Skip relations that cannot be immediately locked for processing.", "signature": "--skip-locked", "source_url": "/docs/15/app-vacuumdb.html", "description": "Skip relations that cannot be immediately locked for processing. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/15/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/15/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/15/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/15/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/15/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "signature": "--analyze-in-stages", "source_url": "/docs/15/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/15/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/15/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/15/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/15/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/15/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/15/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/15/app-vacuumdb.html", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/source/v15.19/postgresql-15.19.tar.bz2", "label": "15.19", "major": "15", "channel": "stable", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/15/postgresql-15-A4.pdf", "bytes": 14609140, "pages": 2987, "sha256": "66228564a4d16efb47d6a914085716ecfe22ca1566db56bc7c3d82f790646d72", "built_at": "2026-09-26"}, "US": {"url": "/files/documentation/pdf/15/postgresql-15-US.pdf", "bytes": 14495690, "pages": 3153, "sha256": "645a498c2390d47a6223ec74770631185807a19c484edb0fc5a295d9f460bc02", "built_at": "2026-09-26"}}, "tree": "15", "index": "index.html", "major": "15", "pages": 1168, "release": "15.19", "source_url": "https://ftp.postgresql.org/pub/source/v15.19/postgresql-15.19.tar.bz2", "svg_assets": 3, "source_mode": "en HTML verified against the pinned official archive", "source_sha256": "e1a64a87a46b825b88c082e4518161a47aab53c45694964f8ba1df28f7859f89"}, "revision": "6af958c6520151fc7697d56e0616b03fb00522c4568158674d452ae0644ba545", "evidence_kind": "English manual and source declarations", "source_sha256": "e1a64a87a46b825b88c082e4518161a47aab53c45694964f8ba1df28f7859f89"}, "sources": [{"url": "https://pg.center/docs/15/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "15.19 English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "b1dffdbb9b9dd4b5aa53849a8e9274a8a14634cf98c9694427c9b0422ffab0ce", "language": "en", "original_url": "/docs/15/app-vacuumdb.html"}, {"url": "https://pg.center/docs/15/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "015b2ea2bd205946a55a1b837e735570631bac831c92074a6bf58444f9a3cb98", "language": "en", "original_url": "/docs/15/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]\nvacuumdb [ connection-option ...] [ option ...] -a | --all", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.22.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [<em class=\"replaceable\"><code>dbname</code></em>]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.22.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] <code class=\"option\">-a</code> | <code class=\"option\">--all</code></p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f SQL \u547d\u4ee4 <a class=\"link\" href=\"/docs/15/sql-vacuum.html\" title=\"VACUUM\"><code class=\"command\">VACUUM</code></a> \u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/15/libpq.html#LIBPQ-CONNSTRING\" title=\"34.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--disable-page-skipping</code></span></dt>\n<dd>\n<p lang=\"zh\">\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--force-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 12 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/15/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u56e0\u6b7b\u9501\u800c\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-mxid-age <em class=\"replaceable\"><code>mxid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>mxid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/15/maintenance.html#VACUUM-FOR-MULTIXACT-WRAPAROUND\" title=\"25.1.5.1.\u00a0\u591a\u4e8b\u52a1\u4e0e\u56de\u5377\">\u7b2c\u00a025.1.5.1\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u591a\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-xid-age <em class=\"replaceable\"><code>xid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>xid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/15/maintenance.html#VACUUM-FOR-WRAPAROUND\" title=\"25.1.5.\u00a0\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\u5931\u8d25\">\u7b2c\u00a025.1.5\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 9.6 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 12 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-toast</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 14 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-truncate</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 12 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-P <em class=\"replaceable\"><code>parallel_workers</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--parallel=<em class=\"replaceable\"><code>parallel_workers</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u6307\u5b9a<em class=\"firstterm\">\u5e76\u884c\u6e05\u7406</em>\u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/15/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 13 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--skip-locked</code></span></dt>\n<dd>\n<p lang=\"zh\">\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002</p>\n<div class=\"note\">\n<h3 class=\"title\" lang=\"zh\">\u6ce8\u610f</h3>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u9002\u7528\u4e8e\u8fd0\u884c<span class=\"productname\">PostgreSQL</span> 12 \u53ca\u66f4\u9ad8\u7248\u672c\u7684\u670d\u52a1\u5668\u3002</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u7c7b\u4f3c <code class=\"option\">--analyze-only</code>\uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1<a class=\"xref\" href=\"/docs/15/runtime-config-query.html#GUC-DEFAULT-STATISTICS-TARGET\">default_statistics_target</a>\uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u5728\u5206\u6790\u5f53\u524d\u6ca1\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u6216\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\u5b8c\u5168\u9519\u8bef\u7684\u6570\u636e\u5e93\u65f6\u624d\u6709\u7528\uff0c\u4f8b\u5982\u6570\u636e\u5e93\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u91cd\u65b0\u586b\u5145\uff0c\u6216\u521a\u901a\u8fc7 <code class=\"command\">pg_upgrade</code> \u5347\u7ea7\u5f97\u5230\u3002\u6ce8\u610f\uff0c\u5728\u5df2\u6709\u7edf\u8ba1\u4fe1\u606f\u7684\u6570\u636e\u5e93\u4e0a\u4f7f\u7528\u6b64\u9009\u9879\uff0c\u53ef\u80fd\u4f1a\u56e0\u4e3a\u65e9\u671f\u9636\u6bb5\u91c7\u7528\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\uff0c\u5bfc\u81f4\u67e5\u8be2\u4f18\u5316\u5668\u7684\u9009\u62e9\u6682\u65f6\u53d8\u5dee\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/15/libpq.html#LIBPQ-CONNSTRING\" title=\"34.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"envar\">PG_COLOR</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a <code class=\"literal\">always</code>\u3001<code class=\"literal\">auto</code>\u548c <code class=\"literal\">never</code>\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/15/libpq-envars.html\" title=\"34.15.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a034.15\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u679c\u9047\u5230\u95ee\u9898\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/15/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/15/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span>\u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.9\">\n<h2 lang=\"zh\">\u6ce8\u89e3</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u53ef\u80fd\u9700\u8981\u591a\u6b21\u8fde\u63a5\u5230<span class=\"productname\">PostgreSQL</span>\u670d\u52a1\u5668\uff0c\u6bcf\u6b21\u90fd\u8981\u8be2\u95ee\u5bc6\u7801\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528<code class=\"filename\">~/.pgpass</code>\u6587\u4ef6\u4f1a\u6bd4\u8f83\u65b9\u4fbf\u3002\u66f4\u591a\u4fe1\u606f\u89c1<a class=\"xref\" href=\"/docs/15/libpq-pgpass.html\" title=\"34.16.\u00a0\u5bc6\u7801\u6587\u4ef6\">\u7b2c\u00a034.16\u00a0\u8282</a>\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.10\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.11\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2><span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/15/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span>\n</div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/15/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "32d0e489e0e7a47367f9cffad1491abe7abba75b07645df070f0740f55082b4c", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[10]/h2[0]", "#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[29]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[31]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[35]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[37]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[39]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[41]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", 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"/versions/15/facts/3/label": "Option definition groups", "/versions/15/tables/0/title": "Documented options", "/versions/15/tables/1/title": "Environment variables", "/versions/15/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/15/tables/0/rows/1/summary": "Disable skipping pages based on the contents of the visibility map.", "/versions/15/tables/0/rows/2/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/15/tables/0/rows/3/summary": "Perform \u201c full \u201d vacuuming.", "/versions/15/tables/0/rows/4/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/15/tables/0/rows/5/summary": "Always remove index entries pointing to dead tuples.", "/versions/15/tables/0/rows/6/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "/versions/15/tables/0/rows/7/summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ).", "/versions/15/tables/0/rows/8/summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ).", "/versions/15/tables/0/rows/9/summary": "Do not remove index entries pointing to dead tuples.", "/versions/15/tables/0/columns/0/label": "Option and arguments", "/versions/15/tables/0/columns/1/label": "Description", "/versions/15/tables/0/rows/10/summary": "Skip the TOAST table associated with the table to vacuum, if any.", "/versions/15/tables/0/rows/11/summary": "Do not truncate empty pages at the end of the table.", "/versions/15/tables/0/rows/12/summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "/versions/15/tables/0/rows/13/summary": "Do not display progress messages.", "/versions/15/tables/0/rows/14/summary": "Skip relations that cannot be immediately locked for processing.", "/versions/15/tables/0/rows/15/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/15/tables/0/rows/16/summary": "Print detailed information during processing.", "/versions/15/tables/0/rows/17/summary": "Print the vacuumdb version and exit.", "/versions/15/tables/0/rows/18/summary": "Also calculate statistics for use by the optimizer.", "/versions/15/tables/0/rows/19/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/15/tables/0/rows/20/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "/versions/15/tables/0/rows/21/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/15/tables/0/rows/22/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/15/tables/0/rows/23/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/15/tables/0/rows/24/summary": "User name to connect as.", "/versions/15/tables/0/rows/25/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/15/tables/0/rows/26/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/15/tables/0/rows/27/summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/15/tables/1/columns/0/label": "Variable", "/versions/15/tables/1/columns/1/label": "Meaning", "/versions/15/tables/1/rows/0/description": "Default connection parameters", "/versions/15/tables/1/rows/1/description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "e49184b5536242ddf78e86a8a9be2b6d691d881a7160d7e51de8d882ae374636"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["--disable-page-skipping"], "signature": "--disable-page-skipping", "description": "Disable skipping pages based on the contents of the visibility map. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "signature": "--force-index-cleanup", "description": "Always remove index entries pointing to dead tuples. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "signature": "--min-mxid-age mxid_age", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--min-xid-age xid_age"], "signature": "--min-xid-age xid_age", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately. Note This option is only available for servers running PostgreSQL 9.6 and later."}, {"names": ["--no-index-cleanup"], "signature": "--no-index-cleanup", "description": "Do not remove index entries pointing to dead tuples. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["--no-process-toast"], "signature": "--no-process-toast", "description": "Skip the TOAST table associated with the table to vacuum, if any. Note This option is only available for servers running PostgreSQL 14 and later."}, {"names": ["--no-truncate"], "signature": "--no-truncate", "description": "Do not truncate empty pages at the end of the table. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "signature": "-P parallel_workers --parallel= parallel_workers", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM . Note This option is only available for servers running PostgreSQL 13 and later."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "signature": "--skip-locked", "description": "Skip relations that cannot be immediately locked for processing. Note This option is only available for servers running PostgreSQL 12 and later."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... 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"signature": {"url": "/docs/16/app-vacuumdb.html", "text": "--min-mxid-age mxid_age"}}, {"summary": "\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a xid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 25.1.5 \u8282 \uff09\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "--min-xid-age xid_age"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -n \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-n schema --schema= schema"}}, {"summary": "\u4e0d\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -N \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-N schema --exclude-schema= schema"}}, {"summary": "\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "--no-index-cleanup"}}, {"summary": "\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "--no-process-main"}}, {"summary": "\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "--no-process-toast"}}, {"summary": "\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "--no-truncate"}}, {"summary": "\u6307\u5b9a \u5e76\u884c\u6e05\u7406 \u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-P parallel_workers --parallel= parallel_workers"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "--skip-locked"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u7c7b\u4f3c --analyze-only \uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1 default_statistics_target \uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/16/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}, {"name": "PG_COLOR", "description": "\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a always \u3001 auto \u548c never \u3002"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/16/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "signature": "--buffer-usage-limit size", "source_url": "/docs/16/app-vacuumdb.html", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "summary": "Disable skipping pages based on the contents of the visibility map.", "signature": "--disable-page-skipping", "source_url": "/docs/16/app-vacuumdb.html", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/16/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/16/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/16/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "summary": "Always remove index entries pointing to dead tuples.", "signature": "--force-index-cleanup", "source_url": "/docs/16/app-vacuumdb.html", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/16/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ).", "signature": "--min-mxid-age mxid_age", "source_url": "/docs/16/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ).", "signature": "--min-xid-age xid_age", "source_url": "/docs/16/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["-n schema", "--schema= schema"], "summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "signature": "-n schema --schema= schema", "source_url": "/docs/16/app-vacuumdb.html", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "signature": "-N schema --exclude-schema= schema", "source_url": "/docs/16/app-vacuumdb.html", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "summary": "Do not remove index entries pointing to dead tuples.", "signature": "--no-index-cleanup", "source_url": "/docs/16/app-vacuumdb.html", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "summary": "Skip the main relation.", "signature": "--no-process-main", "source_url": "/docs/16/app-vacuumdb.html", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "summary": "Skip the TOAST table associated with the table to vacuum, if any.", "signature": "--no-process-toast", "source_url": "/docs/16/app-vacuumdb.html", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "summary": "Do not truncate empty pages at the end of the table.", "signature": "--no-truncate", "source_url": "/docs/16/app-vacuumdb.html", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "signature": "-P parallel_workers --parallel= parallel_workers", "source_url": "/docs/16/app-vacuumdb.html", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/16/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "summary": "Skip relations that cannot be immediately locked for processing.", "signature": "--skip-locked", "source_url": "/docs/16/app-vacuumdb.html", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/16/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/16/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/16/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/16/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/16/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "signature": "--analyze-in-stages", "source_url": "/docs/16/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/16/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/16/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/16/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/16/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/16/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/16/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/16/app-vacuumdb.html", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/source/v16.15/postgresql-16.15.tar.bz2", "label": "16.15", "major": "16", "channel": "stable", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/16/postgresql-16-A4.pdf", "bytes": 15282337, "pages": 3055, "sha256": "4bb6c1f63deedac98736d8c4c7bc0fad0ac24e85b07e21ee10411872f06afd06", "built_at": "2026-09-26"}, "US": {"url": "/files/documentation/pdf/16/postgresql-16-US.pdf", "bytes": 15164148, "pages": 3220, "sha256": "5b6b6166c89991199e144bb0ae34c17a5f29826251dbf19db1abc0df3a3e771b", "built_at": "2026-09-26"}}, "tree": "16", "index": "index.html", "major": "16", "pages": 1169, "release": "16.15", "source_url": "https://ftp.postgresql.org/pub/source/v16.15/postgresql-16.15.tar.bz2", "svg_assets": 3, "source_mode": "en HTML verified against the pinned official archive", "source_sha256": "c1575341fa7bd40f5274ea465b34390f4dc64cdd0770af327005caaeb9f6b7ed"}, "revision": "3c21e58b35318021716440e67bb8bafd392b6a2b965a244d90e9e33c99e0bdef", "evidence_kind": "English manual and source declarations", "source_sha256": "c1575341fa7bd40f5274ea465b34390f4dc64cdd0770af327005caaeb9f6b7ed"}, "sources": [{"url": "https://pg.center/docs/16/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "16.15 English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "c7164e9b7b6eb47aa52273053b734f3b7ffecb7a5fdf703c5e955d16ca3b6cbe", "language": "en", "original_url": "/docs/16/app-vacuumdb.html"}, {"url": "https://pg.center/docs/16/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "a28c30c3c0f8783e16d56413a0b6fd39487e336da1683b29b60abf1c229cef26", "language": "en", "original_url": "/docs/16/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] [ [ -n | --schema schema ] | [ -N | --exclude-schema schema ] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]\nvacuumdb [ connection-option ...] [ option ...] [ [ -n | --schema schema ] | [ -N | --exclude-schema schema ] ] ... [ dbname ]\nvacuumdb [ connection-option ...] [ option ...] -a | --all", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.22.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [<em class=\"replaceable\"><code>dbname</code></em>]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.22.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ [ <code class=\"option\">-n</code> | <code class=\"option\">--schema</code> <em class=\"replaceable\"><code>schema</code></em> ] | [ <code class=\"option\">-N</code> | <code class=\"option\">--exclude-schema</code> <em class=\"replaceable\"><code>schema</code></em> ] ] ... [<em class=\"replaceable\"><code>dbname</code></em>]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.22.4.3\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] <code class=\"option\">-a</code> | <code class=\"option\">--all</code></p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f SQL \u547d\u4ee4 <a class=\"link\" href=\"/docs/16/sql-vacuum.html\" title=\"VACUUM\"><code class=\"command\">VACUUM</code></a> \u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--buffer-usage-limit <em class=\"replaceable\"><code>size</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e3a\u4e00\u6b21\u7ed9\u5b9a\u7684 <span class=\"application\">vacuumdb</span> \u8c03\u7528\u6307\u5b9a<a class=\"glossterm\" href=\"/docs/16/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\"></a><a class=\"glossterm\" href=\"/docs/16/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\" title=\"\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\">\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\uff08Buffer Access Strategy\uff09</a>\u73af\u5f62\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e2a\u5927\u5c0f\u7528\u4e8e\u8ba1\u7b97\u5c06\u4f5c\u4e3a\u8be5\u7b56\u7565\u4e00\u90e8\u5206\u88ab\u91cd\u7528\u7684\u5171\u4eab\u7f13\u51b2\u533a\u6570\u91cf\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/16/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/16/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"34.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--disable-page-skipping</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--force-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/16/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u56e0\u6b7b\u9501\u800c\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-mxid-age <em class=\"replaceable\"><code>mxid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>mxid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/16/routine-vacuuming.html#VACUUM-FOR-MULTIXACT-WRAPAROUND\" title=\"25.1.5.1.\u00a0\u591a\u4e8b\u52a1\u4e0e\u56de\u5377\">\u7b2c\u00a025.1.5.1\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u591a\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-xid-age <em class=\"replaceable\"><code>xid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>xid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/16/routine-vacuuming.html#VACUUM-FOR-WRAPAROUND\" title=\"25.1.5.\u00a0\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\u5931\u8d25\">\u7b2c\u00a025.1.5\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-n <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-n</code> \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-N <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--exclude-schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-N</code> \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-main</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-toast</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-truncate</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-P <em class=\"replaceable\"><code>parallel_workers</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--parallel=<em class=\"replaceable\"><code>parallel_workers</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a<em class=\"firstterm\">\u5e76\u884c\u6e05\u7406</em>\u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/16/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--skip-locked</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u7c7b\u4f3c <code class=\"option\">--analyze-only</code>\uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1<a class=\"xref\" href=\"/docs/16/runtime-config-query.html#GUC-DEFAULT-STATISTICS-TARGET\">default_statistics_target</a>\uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u5728\u5206\u6790\u5f53\u524d\u6ca1\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u6216\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\u5b8c\u5168\u9519\u8bef\u7684\u6570\u636e\u5e93\u65f6\u624d\u6709\u7528\uff0c\u4f8b\u5982\u6570\u636e\u5e93\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u91cd\u65b0\u586b\u5145\uff0c\u6216\u521a\u901a\u8fc7 <code class=\"command\">pg_upgrade</code> \u5347\u7ea7\u5f97\u5230\u3002\u6ce8\u610f\uff0c\u5728\u5df2\u6709\u7edf\u8ba1\u4fe1\u606f\u7684\u6570\u636e\u5e93\u4e0a\u4f7f\u7528\u6b64\u9009\u9879\uff0c\u53ef\u80fd\u4f1a\u56e0\u4e3a\u65e9\u671f\u9636\u6bb5\u91c7\u7528\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\uff0c\u5bfc\u81f4\u67e5\u8be2\u4f18\u5316\u5668\u7684\u9009\u62e9\u6682\u65f6\u53d8\u5dee\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/16/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"34.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"envar\">PG_COLOR</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a <code class=\"literal\">always</code>\u3001<code class=\"literal\">auto</code>\u548c <code class=\"literal\">never</code>\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/16/libpq-envars.html\" title=\"34.15.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a034.15\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u679c\u9047\u5230\u95ee\u9898\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/16/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/16/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span>\u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.9\">\n<h2 lang=\"zh\">\u6ce8\u89e3</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span>\u53ef\u80fd\u9700\u8981\u591a\u6b21\u8fde\u63a5\u5230<span class=\"productname\">PostgreSQL</span>\u670d\u52a1\u5668\uff0c\u6bcf\u6b21\u90fd\u8981\u8be2\u95ee\u5bc6\u7801\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528<code class=\"filename\">~/.pgpass</code>\u6587\u4ef6\u4f1a\u6bd4\u8f83\u65b9\u4fbf\u3002\u66f4\u591a\u4fe1\u606f\u89c1<a class=\"xref\" href=\"/docs/16/libpq-pgpass.html\" title=\"34.16.\u00a0\u5bc6\u7801\u6587\u4ef6\">\u7b2c\u00a034.16\u00a0\u8282</a>\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.10\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d foo \u548c bar \u6a21\u5f0f\u5185\u7684\u6240\u6709\u8868\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --schema='foo' --schema='bar' xyzzy</code></strong>\n</pre>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.22.11\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2><span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/16/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span>\n</div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/16/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "0bae7c28549640aa0182854723090642eb00c7b97d3e5428f9f2825081c7b6d7", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[10]/h2[0]", "#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[29]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[31]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[35]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[37]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[39]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[41]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[41]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[41]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[47]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[49]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[51]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[51]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[53]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[0]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[1]", "#APP-VACUUMDB/div[5]/p[1]", "#APP-VACUUMDB/div[5]/p[3]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[1]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[3]", "#APP-VACUUMDB/div[6]/h2[0]", "#APP-VACUUMDB/div[6]/p[2]", "#APP-VACUUMDB/div[7]/h2[0]", "#APP-VACUUMDB/div[7]/p[1]", "#APP-VACUUMDB/div[8]/h2[0]", "#APP-VACUUMDB/div[8]/p[1]", "#APP-VACUUMDB/div[9]/h2[0]", "#APP-VACUUMDB/div[9]/p[1]", "#APP-VACUUMDB/div[9]/p[3]"]}], "language": "zh", "original_text": {"/versions/16/description/0": "vacuumdb \u2014 garbage-collect and analyze a PostgreSQL database", "/versions/16/facts/0/label": "Documented executable", "/versions/16/facts/1/label": "Executable version", "/versions/16/facts/2/label": "Reference inventory", "/versions/16/facts/2/value": "Client applications", "/versions/16/facts/3/label": "Option definition groups", "/versions/16/tables/0/title": "Documented options", "/versions/16/tables/1/title": "Environment variables", "/versions/16/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/16/tables/0/rows/1/summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "/versions/16/tables/0/rows/2/summary": "Disable skipping pages based on the contents of the visibility map.", "/versions/16/tables/0/rows/3/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/16/tables/0/rows/4/summary": "Perform \u201c full \u201d vacuuming.", "/versions/16/tables/0/rows/5/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/16/tables/0/rows/6/summary": "Always remove index entries pointing to dead tuples.", "/versions/16/tables/0/rows/7/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "/versions/16/tables/0/rows/8/summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ).", "/versions/16/tables/0/rows/9/summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ).", "/versions/16/tables/0/columns/0/label": "Option and arguments", "/versions/16/tables/0/columns/1/label": "Description", "/versions/16/tables/0/rows/10/summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "/versions/16/tables/0/rows/11/summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "/versions/16/tables/0/rows/12/summary": "Do not remove index entries pointing to dead tuples.", "/versions/16/tables/0/rows/13/summary": "Skip the main relation.", "/versions/16/tables/0/rows/14/summary": "Skip the TOAST table associated with the table to vacuum, if any.", "/versions/16/tables/0/rows/15/summary": "Do not truncate empty pages at the end of the table.", "/versions/16/tables/0/rows/16/summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "/versions/16/tables/0/rows/17/summary": "Do not display progress messages.", "/versions/16/tables/0/rows/18/summary": "Skip relations that cannot be immediately locked for processing.", "/versions/16/tables/0/rows/19/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/16/tables/0/rows/20/summary": "Print detailed information during processing.", "/versions/16/tables/0/rows/21/summary": "Print the vacuumdb version and exit.", "/versions/16/tables/0/rows/22/summary": "Also calculate statistics for use by the optimizer.", "/versions/16/tables/0/rows/23/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/16/tables/0/rows/24/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "/versions/16/tables/0/rows/25/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/16/tables/0/rows/26/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/16/tables/0/rows/27/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/16/tables/0/rows/28/summary": "User name to connect as.", "/versions/16/tables/0/rows/29/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/16/tables/0/rows/30/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/16/tables/0/rows/31/summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/16/tables/1/columns/0/label": "Variable", "/versions/16/tables/1/columns/1/label": "Meaning", "/versions/16/tables/1/rows/0/description": "Default connection parameters", "/versions/16/tables/1/rows/1/description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "25e3be8ff87fbe90994c1983b3a82867c785a8c5bdad3cb6bb1a4f0f69fe1a48"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "signature": "--buffer-usage-limit size", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "signature": "--disable-page-skipping", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "signature": "--force-index-cleanup", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "signature": "--min-mxid-age mxid_age", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "signature": "--min-xid-age xid_age", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["-n schema", "--schema= schema"], "signature": "-n schema --schema= schema", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "signature": "-N schema --exclude-schema= schema", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "signature": "--no-index-cleanup", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "signature": "--no-process-main", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "signature": "--no-process-toast", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "signature": "--no-truncate", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "signature": "-P parallel_workers --parallel= parallel_workers", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "signature": "--skip-locked", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] [ [ -n | --schema schema ] | [ -N | --exclude-schema schema ] ] ... [ dbname ]", "vacuumdb [ connection-option ...] [ option ...] -a | --all"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}]}, "comparison_hash": "18e256b13ff8fa45c43018bcd981c1402bc0cf88a6990d0545badd137d780a68", "manual_language": "zh"}, "17": {"facts": [{"label": "\u624b\u518c\u4e2d\u7684\u53ef\u6267\u884c\u7a0b\u5e8f", "value": "vacuumdb"}, {"label": "\u7a0b\u5e8f\u7248\u672c", "value": "17.11"}, {"label": "\u53c2\u8003\u6e05\u5355", "value": "\u5ba2\u6237\u7aef\u7a0b\u5e8f"}, {"label": "\u9009\u9879\u5b9a\u4e49\u7ec4", "value": "32"}], "tables": [{"key": "options", "rows": [{"summary": "\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-a --all"}}, {"summary": "\u4e3a\u4e00\u6b21\u7ed9\u5b9a\u7684 vacuumdb \u8c03\u7528\u6307\u5b9a \u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\uff08Buffer Access Strategy\uff09 \u73af\u5f62\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e2a\u5927\u5c0f\u7528\u4e8e\u8ba1\u7b97\u5c06\u4f5c\u4e3a\u8be5\u7b56\u7565\u4e00\u90e8\u5206\u88ab\u91cd\u7528\u7684\u5171\u4eab\u7f13\u51b2\u533a\u6570\u91cf\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--buffer-usage-limit size"}}, {"summary": "\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--disable-page-skipping"}}, {"summary": "\u56de\u663e vacuumdb \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-e --echo"}}, {"summary": "\u6267\u884c \u201c \u5b8c\u5168 \u201d \u6e05\u7406\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-f --full"}}, {"summary": "\u6fc0\u8fdb\u5730 \u201c \u51bb\u7ed3 \u201d \u5143\u7ec4\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-F --freeze"}}, {"summary": "\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--force-index-cleanup"}}, {"summary": "\u901a\u8fc7\u540c\u65f6\u8fd0\u884c njobs \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-j njobs --jobs= njobs"}}, {"summary": "\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a mxid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5.1 \u8282 \uff09\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--min-mxid-age mxid_age"}}, {"summary": "\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a xid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5 \u8282 \uff09\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--min-xid-age xid_age"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -n \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-n schema --schema= schema"}}, {"summary": "\u4e0d\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -N \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-N schema --exclude-schema= schema"}}, {"summary": "\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--no-index-cleanup"}}, {"summary": "\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--no-process-main"}}, {"summary": "\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--no-process-toast"}}, {"summary": "\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--no-truncate"}}, {"summary": "\u6307\u5b9a \u5e76\u884c\u6e05\u7406 \u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-P parallel_workers --parallel= parallel_workers"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--skip-locked"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u7c7b\u4f3c --analyze-only \uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1 default_statistics_target \uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/17/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}, {"name": "PG_COLOR", "description": "\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a always \u3001 auto \u548c never \u3002"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/17/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "signature": "--buffer-usage-limit size", "source_url": "/docs/17/app-vacuumdb.html", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "summary": "Disable skipping pages based on the contents of the visibility map.", "signature": "--disable-page-skipping", "source_url": "/docs/17/app-vacuumdb.html", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/17/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/17/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/17/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "summary": "Always remove index entries pointing to dead tuples.", "signature": "--force-index-cleanup", "source_url": "/docs/17/app-vacuumdb.html", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/17/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "signature": "--min-mxid-age mxid_age", "source_url": "/docs/17/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "signature": "--min-xid-age xid_age", "source_url": "/docs/17/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["-n schema", "--schema= schema"], "summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "signature": "-n schema --schema= schema", "source_url": "/docs/17/app-vacuumdb.html", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "signature": "-N schema --exclude-schema= schema", "source_url": "/docs/17/app-vacuumdb.html", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "summary": "Do not remove index entries pointing to dead tuples.", "signature": "--no-index-cleanup", "source_url": "/docs/17/app-vacuumdb.html", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "summary": "Skip the main relation.", "signature": "--no-process-main", "source_url": "/docs/17/app-vacuumdb.html", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "summary": "Skip the TOAST table associated with the table to vacuum, if any.", "signature": "--no-process-toast", "source_url": "/docs/17/app-vacuumdb.html", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "summary": "Do not truncate empty pages at the end of the table.", "signature": "--no-truncate", "source_url": "/docs/17/app-vacuumdb.html", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "signature": "-P parallel_workers --parallel= parallel_workers", "source_url": "/docs/17/app-vacuumdb.html", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/17/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "summary": "Skip relations that cannot be immediately locked for processing.", "signature": "--skip-locked", "source_url": "/docs/17/app-vacuumdb.html", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/17/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/17/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/17/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/17/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/17/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "signature": "--analyze-in-stages", "source_url": "/docs/17/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/17/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/17/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/17/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/17/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/17/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/17/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/17/app-vacuumdb.html", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/source/v17.11/postgresql-17.11.tar.bz2", "label": "17.11", "major": "17", "channel": "stable", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/17/postgresql-17-A4.pdf", "bytes": 15521293, "pages": 3099, "sha256": "1991354df0dc89e70ec39328c28988ef8b19c6a93671dab3893650b63e9f4e36", "built_at": "2026-09-26"}, "US": {"url": "/files/documentation/pdf/17/postgresql-17-US.pdf", "bytes": 15398150, "pages": 3270, "sha256": "07696c8f38abf31babf22d2db337093936e7c472d2af36d050b000c49bbcf52c", "built_at": "2026-09-26"}}, "tree": "17", "index": "index.html", "major": "17", "pages": 1143, "release": "17.11", "source_url": "https://ftp.postgresql.org/pub/source/v17.11/postgresql-17.11.tar.bz2", "svg_assets": 3, "source_mode": "en SGML built with pinned official archive", "source_sha256": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "revision": "58419c9b0dd42cb34c8d53695bb025a7e582edf55ccd4c5bcb1c2c7c71a37487", "evidence_kind": "English manual and source declarations", "source_sha256": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "sources": [{"url": "https://pg.center/docs/17/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "17.11 English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "418cf9a54d31f4b624a219533b1365ce6ad8816d3bf5704fab25f7af2f442699", "language": "en", "original_url": "/docs/17/app-vacuumdb.html"}, {"url": "https://pg.center/docs/17/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "3194fc72ddad8e2fcba55f8e007f83413cb352146cb65aaa9457a18d0314ee1b", "language": "en", "original_url": "/docs/17/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]\nvacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]\nvacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-n</code> | <code class=\"option\">--schema</code> <em class=\"replaceable\"><code>schema</code></em> ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.3\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-N</code> | <code class=\"option\">--exclude-schema</code> <em class=\"replaceable\"><code>schema</code></em> ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f SQL \u547d\u4ee4 <a class=\"link\" href=\"/docs/17/sql-vacuum.html\" title=\"VACUUM\"><code class=\"command\">VACUUM</code></a> \u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--buffer-usage-limit <em class=\"replaceable\"><code>size</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e3a\u4e00\u6b21\u7ed9\u5b9a\u7684 <span class=\"application\">vacuumdb</span> \u8c03\u7528\u6307\u5b9a<a class=\"glossterm\" href=\"/docs/17/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\"></a><a class=\"glossterm\" href=\"/docs/17/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\" title=\"\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\">\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\uff08Buffer Access Strategy\uff09</a>\u73af\u5f62\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e2a\u5927\u5c0f\u7528\u4e8e\u8ba1\u7b97\u5c06\u4f5c\u4e3a\u8be5\u7b56\u7565\u4e00\u90e8\u5206\u88ab\u91cd\u7528\u7684\u5171\u4eab\u7f13\u51b2\u533a\u6570\u91cf\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/17/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/17/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--disable-page-skipping</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--force-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/17/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u56e0\u6b7b\u9501\u800c\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-mxid-age <em class=\"replaceable\"><code>mxid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>mxid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/17/routine-vacuuming.html#VACUUM-FOR-MULTIXACT-WRAPAROUND\" title=\"24.1.5.1.\u00a0\u591a\u4e8b\u52a1\u4e0e\u56de\u5377\">\u7b2c\u00a024.1.5.1\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u591a\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-xid-age <em class=\"replaceable\"><code>xid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>xid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/17/routine-vacuuming.html#VACUUM-FOR-WRAPAROUND\" title=\"24.1.5.\u00a0\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\u5931\u8d25\">\u7b2c\u00a024.1.5\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-n <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-n</code> \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-N <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--exclude-schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-N</code> \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-main</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-toast</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-truncate</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-P <em class=\"replaceable\"><code>parallel_workers</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--parallel=<em class=\"replaceable\"><code>parallel_workers</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a<em class=\"firstterm\">\u5e76\u884c\u6e05\u7406</em>\u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/17/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--skip-locked</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u7c7b\u4f3c <code class=\"option\">--analyze-only</code>\uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1<a class=\"xref\" href=\"/docs/17/runtime-config-query.html#GUC-DEFAULT-STATISTICS-TARGET\">default_statistics_target</a>\uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u5728\u5206\u6790\u5f53\u524d\u6ca1\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u6216\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\u5b8c\u5168\u9519\u8bef\u7684\u6570\u636e\u5e93\u65f6\u624d\u6709\u7528\uff0c\u4f8b\u5982\u6570\u636e\u5e93\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u91cd\u65b0\u586b\u5145\uff0c\u6216\u521a\u901a\u8fc7 <code class=\"command\">pg_upgrade</code> \u5347\u7ea7\u5f97\u5230\u3002\u6ce8\u610f\uff0c\u5728\u5df2\u6709\u7edf\u8ba1\u4fe1\u606f\u7684\u6570\u636e\u5e93\u4e0a\u4f7f\u7528\u6b64\u9009\u9879\uff0c\u53ef\u80fd\u4f1a\u56e0\u4e3a\u65e9\u671f\u9636\u6bb5\u91c7\u7528\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\uff0c\u5bfc\u81f4\u67e5\u8be2\u4f18\u5316\u5668\u7684\u9009\u62e9\u6682\u65f6\u53d8\u5dee\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/17/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"envar\">PG_COLOR</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a <code class=\"literal\">always</code>\u3001<code class=\"literal\">auto</code>\u548c <code class=\"literal\">never</code>\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/17/libpq-envars.html\" title=\"32.15.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a032.15\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u679c\u9047\u5230\u95ee\u9898\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/17/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/17/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span>\u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.9\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d foo \u548c bar \u6a21\u5f0f\u5185\u7684\u6240\u6709\u8868\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --schema='foo' --schema='bar' xyzzy</code></strong>\n</pre>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.10\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2><span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/17/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span>\n</div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/17/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "89422dc8502dfebc71846d8645daf0427cee556759e819ec4a5f5c1af1eb6228", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[29]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[31]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[35]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[37]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[39]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[41]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[41]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[41]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[47]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[49]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[51]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[51]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[53]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[0]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[1]", "#APP-VACUUMDB/div[5]/p[1]", "#APP-VACUUMDB/div[5]/p[3]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[1]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[3]", "#APP-VACUUMDB/div[6]/h2[0]", "#APP-VACUUMDB/div[6]/p[2]", "#APP-VACUUMDB/div[7]/h2[0]", "#APP-VACUUMDB/div[7]/p[1]", "#APP-VACUUMDB/div[8]/h2[0]", "#APP-VACUUMDB/div[8]/p[1]", "#APP-VACUUMDB/div[8]/p[3]", "#APP-VACUUMDB/div[9]/h2[0]"]}], "language": "zh", "original_text": {"/versions/17/description/0": "vacuumdb \u2014 garbage-collect and analyze a PostgreSQL database", "/versions/17/facts/0/label": "Documented executable", "/versions/17/facts/1/label": "Executable version", "/versions/17/facts/2/label": "Reference inventory", "/versions/17/facts/2/value": "Client applications", "/versions/17/facts/3/label": "Option definition groups", "/versions/17/tables/0/title": "Documented options", "/versions/17/tables/1/title": "Environment variables", "/versions/17/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/17/tables/0/rows/1/summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "/versions/17/tables/0/rows/2/summary": "Disable skipping pages based on the contents of the visibility map.", "/versions/17/tables/0/rows/3/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/17/tables/0/rows/4/summary": "Perform \u201c full \u201d vacuuming.", "/versions/17/tables/0/rows/5/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/17/tables/0/rows/6/summary": "Always remove index entries pointing to dead tuples.", "/versions/17/tables/0/rows/7/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "/versions/17/tables/0/rows/8/summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "/versions/17/tables/0/rows/9/summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "/versions/17/tables/0/columns/0/label": "Option and arguments", "/versions/17/tables/0/columns/1/label": "Description", "/versions/17/tables/0/rows/10/summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "/versions/17/tables/0/rows/11/summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "/versions/17/tables/0/rows/12/summary": "Do not remove index entries pointing to dead tuples.", "/versions/17/tables/0/rows/13/summary": "Skip the main relation.", "/versions/17/tables/0/rows/14/summary": "Skip the TOAST table associated with the table to vacuum, if any.", "/versions/17/tables/0/rows/15/summary": "Do not truncate empty pages at the end of the table.", "/versions/17/tables/0/rows/16/summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "/versions/17/tables/0/rows/17/summary": "Do not display progress messages.", "/versions/17/tables/0/rows/18/summary": "Skip relations that cannot be immediately locked for processing.", "/versions/17/tables/0/rows/19/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/17/tables/0/rows/20/summary": "Print detailed information during processing.", "/versions/17/tables/0/rows/21/summary": "Print the vacuumdb version and exit.", "/versions/17/tables/0/rows/22/summary": "Also calculate statistics for use by the optimizer.", "/versions/17/tables/0/rows/23/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/17/tables/0/rows/24/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "/versions/17/tables/0/rows/25/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/17/tables/0/rows/26/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/17/tables/0/rows/27/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/17/tables/0/rows/28/summary": "User name to connect as.", "/versions/17/tables/0/rows/29/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/17/tables/0/rows/30/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/17/tables/0/rows/31/summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/17/tables/1/columns/0/label": "Variable", "/versions/17/tables/1/columns/1/label": "Meaning", "/versions/17/tables/1/rows/0/description": "Default connection parameters", "/versions/17/tables/1/rows/1/description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "618cae6c3a36663d49d6d59a512390b77ebb752cbca572abc9f05e6e16e9c692"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "signature": "--buffer-usage-limit size", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "signature": "--disable-page-skipping", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "signature": "--force-index-cleanup", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "signature": "--min-mxid-age mxid_age", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "signature": "--min-xid-age xid_age", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["-n schema", "--schema= schema"], "signature": "-n schema --schema= schema", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "signature": "-N schema --exclude-schema= schema", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "signature": "--no-index-cleanup", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "signature": "--no-process-main", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "signature": "--no-process-toast", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "signature": "--no-truncate", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "signature": "-P parallel_workers --parallel= parallel_workers", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "signature": "--skip-locked", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}]}, "comparison_hash": "f894d21937972b15127eaefa0c36ede6202ac608174af2e4b9a583295757fba9", "manual_language": "zh"}, "18": {"facts": [{"label": "\u624b\u518c\u4e2d\u7684\u53ef\u6267\u884c\u7a0b\u5e8f", "value": "vacuumdb"}, {"label": "\u7a0b\u5e8f\u7248\u672c", "value": "18.6"}, {"label": "\u53c2\u8003\u6e05\u5355", "value": "\u5ba2\u6237\u7aef\u7a0b\u5e8f"}, {"label": "\u9009\u9879\u5b9a\u4e49\u7ec4", "value": "33"}], "tables": [{"key": "options", "rows": [{"summary": "\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-a --all"}}, {"summary": "\u4e3a\u4e00\u6b21\u7ed9\u5b9a\u7684 vacuumdb \u8c03\u7528\u6307\u5b9a \u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\uff08Buffer Access Strategy\uff09 \u73af\u5f62\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e2a\u5927\u5c0f\u7528\u4e8e\u8ba1\u7b97\u5c06\u4f5c\u4e3a\u8be5\u7b56\u7565\u4e00\u90e8\u5206\u88ab\u91cd\u7528\u7684\u5171\u4eab\u7f13\u51b2\u533a\u6570\u91cf\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--buffer-usage-limit size"}}, {"summary": "\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--disable-page-skipping"}}, {"summary": "\u56de\u663e vacuumdb \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-e --echo"}}, {"summary": "\u6267\u884c \u201c \u5b8c\u5168 \u201d \u6e05\u7406\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-f --full"}}, {"summary": "\u6fc0\u8fdb\u5730 \u201c \u51bb\u7ed3 \u201d \u5143\u7ec4\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-F --freeze"}}, {"summary": "\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--force-index-cleanup"}}, {"summary": "\u901a\u8fc7\u540c\u65f6\u8fd0\u884c njobs \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-j njobs --jobs= njobs"}}, {"summary": "\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a mxid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5.1 \u8282 \uff09\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--min-mxid-age mxid_age"}}, {"summary": "\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a xid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5 \u8282 \uff09\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--min-xid-age xid_age"}}, {"summary": "\u4ec5\u5206\u6790\u90a3\u4e9b\u5728\u5217\u3001\u7d22\u5f15\u8868\u8fbe\u5f0f\u6216\u6269\u5c55\u7edf\u8ba1\u4fe1\u606f\u5bf9\u8c61\u4e0a\u7f3a\u5c11\u7edf\u8ba1\u4fe1\u606f\u7684\u5173\u7cfb\u3002\u4e0e --analyze-in-stages \u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u6b64\u9009\u9879\u53ef\u9632\u6b62 vacuumdb \u4e34\u65f6\u7528\u6309\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\u751f\u6210\u7684\u7edf\u8ba1\u4fe1\u606f\u66ff\u6362\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u4ece\u800c\u907f\u514d\u67e5\u8be2\u4f18\u5316\u5668\u77ed\u6682\u5730\u4f5c\u51fa\u66f4\u5dee\u7684\u9009\u62e9\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--missing-stats-only"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -n \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-n schema --schema= schema"}}, {"summary": "\u4e0d\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -N \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-N schema --exclude-schema= schema"}}, {"summary": "\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--no-index-cleanup"}}, {"summary": "\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--no-process-main"}}, {"summary": "\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--no-process-toast"}}, {"summary": "\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--no-truncate"}}, {"summary": "\u6307\u5b9a \u5e76\u884c\u6e05\u7406 \u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-P parallel_workers --parallel= parallel_workers"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--skip-locked"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u7c7b\u4f3c --analyze-only \uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1 default_statistics_target \uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}, {"name": "PG_COLOR", "description": "\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a always \u3001 auto \u548c never \u3002"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/18/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "signature": "--buffer-usage-limit size", "source_url": "/docs/18/app-vacuumdb.html", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "summary": "Disable skipping pages based on the contents of the visibility map.", "signature": "--disable-page-skipping", "source_url": "/docs/18/app-vacuumdb.html", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/18/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/18/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/18/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "summary": "Always remove index entries pointing to dead tuples.", "signature": "--force-index-cleanup", "source_url": "/docs/18/app-vacuumdb.html", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/18/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "signature": "--min-mxid-age mxid_age", "source_url": "/docs/18/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "signature": "--min-xid-age xid_age", "source_url": "/docs/18/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--missing-stats-only"], "summary": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices.", "signature": "--missing-stats-only", "source_url": "/docs/18/app-vacuumdb.html", "description": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices. This option can only be used in conjunction with --analyze-only or --analyze-in-stages . Note that --missing-stats-only requires SELECT privileges on pg_statistic and pg_statistic_ext_data , which are restricted to superusers by default."}, {"names": ["-n schema", "--schema= schema"], "summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "signature": "-n schema --schema= schema", "source_url": "/docs/18/app-vacuumdb.html", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "signature": "-N schema --exclude-schema= schema", "source_url": "/docs/18/app-vacuumdb.html", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "summary": "Do not remove index entries pointing to dead tuples.", "signature": "--no-index-cleanup", "source_url": "/docs/18/app-vacuumdb.html", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "summary": "Skip the main relation.", "signature": "--no-process-main", "source_url": "/docs/18/app-vacuumdb.html", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "summary": "Skip the TOAST table associated with the table to vacuum, if any.", "signature": "--no-process-toast", "source_url": "/docs/18/app-vacuumdb.html", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "summary": "Do not truncate empty pages at the end of the table.", "signature": "--no-truncate", "source_url": "/docs/18/app-vacuumdb.html", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "signature": "-P parallel_workers --parallel= parallel_workers", "source_url": "/docs/18/app-vacuumdb.html", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/18/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "summary": "Skip relations that cannot be immediately locked for processing.", "signature": "--skip-locked", "source_url": "/docs/18/app-vacuumdb.html", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/18/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/18/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/18/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/18/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/18/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "signature": "--analyze-in-stages", "source_url": "/docs/18/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/18/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/18/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/18/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/18/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/18/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/18/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/18/app-vacuumdb.html", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2", "label": "18.6", "major": "18", "channel": "stable", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/18/postgresql-18-A4.pdf", "bytes": 15865106, "pages": 3154, "sha256": "19512c405da53f9f7fcf0abba359223aa65f021be025bf3411381918f92e3190", "built_at": "2026-09-26"}, "US": {"url": "/files/documentation/pdf/18/postgresql-18-US.pdf", "bytes": 15748059, "pages": 3328, "sha256": "facbe6c229e598b872d3d98bef53308f46e06746006fa4590de9a7de9dd46319", "built_at": "2026-09-26"}}, "tree": "18", "index": "index.html", "major": "18", "pages": 1148, "release": "18.6", "source_url": "https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2", "svg_assets": 3, "source_mode": "en SGML built with pinned official archive", "source_sha256": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "revision": "ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8", "evidence_kind": "English manual and source declarations", "source_sha256": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "sources": [{"url": "https://pg.center/docs/18/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "18.6 English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "bf6a6504348c7e0f81a39c49654524dcfebfc8f0ff7340d492daf13c64f76eb9", "language": "en", "original_url": "/docs/18/app-vacuumdb.html"}, {"url": "https://pg.center/docs/18/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "68f726af77272fe73a827be2b7b5958d0f2239a6f8ed44264e9d42496bfa4fd0", "language": "en", "original_url": "/docs/18/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]\nvacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]\nvacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-n</code> | <code class=\"option\">--schema</code> <em class=\"replaceable\"><code>schema</code></em> ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.3\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-N</code> | <code class=\"option\">--exclude-schema</code> <em class=\"replaceable\"><code>schema</code></em> ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f SQL \u547d\u4ee4 <a class=\"link\" href=\"/docs/18/sql-vacuum.html\" title=\"VACUUM\"><code class=\"command\">VACUUM</code></a> \u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--buffer-usage-limit <em class=\"replaceable\"><code>size</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e3a\u4e00\u6b21\u7ed9\u5b9a\u7684 <span class=\"application\">vacuumdb</span> \u8c03\u7528\u6307\u5b9a<a class=\"glossterm\" href=\"/docs/18/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\"></a><a class=\"glossterm\" href=\"/docs/18/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\" title=\"\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\">\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\uff08Buffer Access Strategy\uff09</a>\u73af\u5f62\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e2a\u5927\u5c0f\u7528\u4e8e\u8ba1\u7b97\u5c06\u4f5c\u4e3a\u8be5\u7b56\u7565\u4e00\u90e8\u5206\u88ab\u91cd\u7528\u7684\u5171\u4eab\u7f13\u51b2\u533a\u6570\u91cf\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/18/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/18/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--disable-page-skipping</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--force-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/18/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u56e0\u6b7b\u9501\u800c\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-mxid-age <em class=\"replaceable\"><code>mxid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>mxid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/18/routine-vacuuming.html#VACUUM-FOR-MULTIXACT-WRAPAROUND\" title=\"24.1.5.1.\u00a0\u591a\u4e8b\u52a1\u4e0e\u56de\u5377\">\u7b2c\u00a024.1.5.1\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u591a\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-xid-age <em class=\"replaceable\"><code>xid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>xid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/18/routine-vacuuming.html#VACUUM-FOR-WRAPAROUND\" title=\"24.1.5.\u00a0\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\u5931\u8d25\">\u7b2c\u00a024.1.5\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--missing-stats-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5206\u6790\u90a3\u4e9b\u5728\u5217\u3001\u7d22\u5f15\u8868\u8fbe\u5f0f\u6216\u6269\u5c55\u7edf\u8ba1\u4fe1\u606f\u5bf9\u8c61\u4e0a\u7f3a\u5c11\u7edf\u8ba1\u4fe1\u606f\u7684\u5173\u7cfb\u3002\u4e0e <code class=\"option\">--analyze-in-stages</code> \u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u6b64\u9009\u9879\u53ef\u9632\u6b62 <span class=\"application\">vacuumdb</span> \u4e34\u65f6\u7528\u6309\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\u751f\u6210\u7684\u7edf\u8ba1\u4fe1\u606f\u66ff\u6362\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u4ece\u800c\u907f\u514d\u67e5\u8be2\u4f18\u5316\u5668\u77ed\u6682\u5730\u4f5c\u51fa\u66f4\u5dee\u7684\u9009\u62e9\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u53ea\u80fd\u4e0e <code class=\"option\">--analyze-only</code> \u6216 <code class=\"option\">--analyze-in-stages</code> \u914d\u5408\u4f7f\u7528\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c<code class=\"option\">--missing-stats-only</code> \u8981\u6c42\u62e5\u6709 <code class=\"literal\">SELECT</code> \u6743\u9650\uff0c\u4ee5\u8bbf\u95ee <a class=\"link\" href=\"/docs/18/catalog-pg-statistic.html\" title=\"52.51.\u00a0pg_statistic\"><code class=\"structname\">pg_statistic</code></a> \u548c <a class=\"link\" href=\"/docs/18/catalog-pg-statistic-ext-data.html\" title=\"52.53.\u00a0pg_statistic_ext_data\"><code class=\"structname\">pg_statistic_ext_data</code></a>\uff0c\u800c\u8fd9\u4e9b\u6743\u9650\u9ed8\u8ba4\u53ea\u6388\u4e88\u8d85\u7ea7\u7528\u6237\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-n <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-n</code> \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-N <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--exclude-schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-N</code> \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-main</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-toast</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-truncate</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-P <em class=\"replaceable\"><code>parallel_workers</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--parallel=<em class=\"replaceable\"><code>parallel_workers</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a<em class=\"firstterm\">\u5e76\u884c\u6e05\u7406</em>\u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/18/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--skip-locked</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u7c7b\u4f3c <code class=\"option\">--analyze-only</code>\uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1<a class=\"xref\" href=\"/docs/18/runtime-config-query.html#GUC-DEFAULT-STATISTICS-TARGET\">default_statistics_target</a>\uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u5728\u5206\u6790\u5f53\u524d\u6ca1\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u6216\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\u5b8c\u5168\u9519\u8bef\u7684\u6570\u636e\u5e93\u65f6\u624d\u6709\u7528\uff0c\u4f8b\u5982\u6570\u636e\u5e93\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u91cd\u65b0\u586b\u5145\uff0c\u6216\u521a\u901a\u8fc7 <code class=\"command\">pg_upgrade</code> \u5347\u7ea7\u5f97\u5230\u3002\u6ce8\u610f\uff0c\u5728\u5df2\u6709\u7edf\u8ba1\u4fe1\u606f\u7684\u6570\u636e\u5e93\u4e0a\u4f7f\u7528\u6b64\u9009\u9879\uff0c\u53ef\u80fd\u4f1a\u56e0\u4e3a\u65e9\u671f\u9636\u6bb5\u91c7\u7528\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\uff0c\u5bfc\u81f4\u67e5\u8be2\u4f18\u5316\u5668\u7684\u9009\u62e9\u6682\u65f6\u53d8\u5dee\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/18/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"envar\">PG_COLOR</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a <code class=\"literal\">always</code>\u3001<code class=\"literal\">auto</code>\u548c <code class=\"literal\">never</code>\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/18/libpq-envars.html\" title=\"32.15.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a032.15\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u679c\u9047\u5230\u95ee\u9898\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/18/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/18/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span>\u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.9\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d foo \u548c bar \u6a21\u5f0f\u5185\u7684\u6240\u6709\u8868\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --schema='foo' --schema='bar' xyzzy</code></strong>\n</pre>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.10\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2><span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/18/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span>\n</div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/18/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "78ed078fc5c42065c077704220de349c29e128410224abeceb277bc63c2531c1", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[29]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[31]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[35]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[37]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[39]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[41]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[47]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[49]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[51]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[53]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[53]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[55]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[0]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[1]", "#APP-VACUUMDB/div[5]/p[1]", "#APP-VACUUMDB/div[5]/p[3]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[1]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[3]", "#APP-VACUUMDB/div[6]/h2[0]", "#APP-VACUUMDB/div[6]/p[2]", "#APP-VACUUMDB/div[7]/h2[0]", "#APP-VACUUMDB/div[7]/p[1]", "#APP-VACUUMDB/div[8]/h2[0]", "#APP-VACUUMDB/div[8]/p[1]", "#APP-VACUUMDB/div[8]/p[3]", "#APP-VACUUMDB/div[9]/h2[0]"]}], "language": "zh", "original_text": {"/versions/18/description/0": "vacuumdb \u2014 garbage-collect and analyze a PostgreSQL database", "/versions/18/facts/0/label": "Documented executable", "/versions/18/facts/1/label": "Executable version", "/versions/18/facts/2/label": "Reference inventory", "/versions/18/facts/2/value": "Client applications", "/versions/18/facts/3/label": "Option definition groups", "/versions/18/tables/0/title": "Documented options", "/versions/18/tables/1/title": "Environment variables", "/versions/18/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/18/tables/0/rows/1/summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "/versions/18/tables/0/rows/2/summary": "Disable skipping pages based on the contents of the visibility map.", "/versions/18/tables/0/rows/3/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/18/tables/0/rows/4/summary": "Perform \u201c full \u201d vacuuming.", "/versions/18/tables/0/rows/5/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/18/tables/0/rows/6/summary": "Always remove index entries pointing to dead tuples.", "/versions/18/tables/0/rows/7/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "/versions/18/tables/0/rows/8/summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "/versions/18/tables/0/rows/9/summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "/versions/18/tables/0/columns/0/label": "Option and arguments", "/versions/18/tables/0/columns/1/label": "Description", "/versions/18/tables/0/rows/10/summary": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices.", "/versions/18/tables/0/rows/11/summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "/versions/18/tables/0/rows/12/summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "/versions/18/tables/0/rows/13/summary": "Do not remove index entries pointing to dead tuples.", "/versions/18/tables/0/rows/14/summary": "Skip the main relation.", "/versions/18/tables/0/rows/15/summary": "Skip the TOAST table associated with the table to vacuum, if any.", "/versions/18/tables/0/rows/16/summary": "Do not truncate empty pages at the end of the table.", "/versions/18/tables/0/rows/17/summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "/versions/18/tables/0/rows/18/summary": "Do not display progress messages.", "/versions/18/tables/0/rows/19/summary": "Skip relations that cannot be immediately locked for processing.", "/versions/18/tables/0/rows/20/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/18/tables/0/rows/21/summary": "Print detailed information during processing.", "/versions/18/tables/0/rows/22/summary": "Print the vacuumdb version and exit.", "/versions/18/tables/0/rows/23/summary": "Also calculate statistics for use by the optimizer.", "/versions/18/tables/0/rows/24/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/18/tables/0/rows/25/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "/versions/18/tables/0/rows/26/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/18/tables/0/rows/27/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/18/tables/0/rows/28/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/18/tables/0/rows/29/summary": "User name to connect as.", "/versions/18/tables/0/rows/30/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/18/tables/0/rows/31/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/18/tables/0/rows/32/summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/18/tables/1/columns/0/label": "Variable", "/versions/18/tables/1/columns/1/label": "Meaning", "/versions/18/tables/1/rows/0/description": "Default connection parameters", "/versions/18/tables/1/rows/1/description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "f2088b1e29c02459b6d0e02c2523d85e5b8075090ba51bdfc2d79bc76b9dc224"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "signature": "--buffer-usage-limit size", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "signature": "--disable-page-skipping", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "signature": "--force-index-cleanup", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "signature": "--min-mxid-age mxid_age", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "signature": "--min-xid-age xid_age", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--missing-stats-only"], "signature": "--missing-stats-only", "description": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices. This option can only be used in conjunction with --analyze-only or --analyze-in-stages . Note that --missing-stats-only requires SELECT privileges on pg_statistic and pg_statistic_ext_data , which are restricted to superusers by default."}, {"names": ["-n schema", "--schema= schema"], "signature": "-n schema --schema= schema", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "signature": "-N schema --exclude-schema= schema", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "signature": "--no-index-cleanup", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "signature": "--no-process-main", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "signature": "--no-process-toast", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "signature": "--no-truncate", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "signature": "-P parallel_workers --parallel= parallel_workers", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "signature": "--skip-locked", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}]}, "comparison_hash": "c475ca852806a0a70db22a56bbad2d270080a07ee8d55cb7db8335b2d58e171a", "manual_language": "zh"}, "19": {"facts": [{"label": "\u624b\u518c\u4e2d\u7684\u53ef\u6267\u884c\u7a0b\u5e8f", "value": "vacuumdb"}, {"label": "\u7a0b\u5e8f\u7248\u672c", "value": "19beta4"}, {"label": "\u53c2\u8003\u6e05\u5355", "value": "\u5ba2\u6237\u7aef\u7a0b\u5e8f"}, {"label": "\u9009\u9879\u5b9a\u4e49\u7ec4", "value": "34"}], "tables": [{"key": "options", "rows": [{"summary": "\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-a --all"}}, {"summary": "\u4e3a\u4e00\u6b21\u7ed9\u5b9a\u7684 vacuumdb \u8c03\u7528\u6307\u5b9a \u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\uff08Buffer Access Strategy\uff09 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"\u6267\u884c \u201c \u5b8c\u5168 \u201d \u6e05\u7406\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-f --full"}}, {"summary": "\u6fc0\u8fdb\u5730 \u201c \u51bb\u7ed3 \u201d \u5143\u7ec4\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-F --freeze"}}, {"summary": "\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "--force-index-cleanup"}}, {"summary": "\u901a\u8fc7\u540c\u65f6\u8fd0\u884c njobs \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-j njobs --jobs= njobs"}}, {"summary": "\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a mxid_age 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\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u6b64\u9009\u9879\u53ef\u9632\u6b62 vacuumdb \u4e34\u65f6\u7528\u6309\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\u751f\u6210\u7684\u7edf\u8ba1\u4fe1\u606f\u66ff\u6362\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u4ece\u800c\u907f\u514d\u67e5\u8be2\u4f18\u5316\u5668\u77ed\u6682\u5730\u4f5c\u51fa\u66f4\u5dee\u7684\u9009\u62e9\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "--missing-stats-only"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -n \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-n schema --schema= schema"}}, {"summary": "\u4e0d\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -N \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-N schema --exclude-schema= schema"}}, {"summary": "\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "--no-index-cleanup"}}, {"summary": "\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "--no-process-main"}}, {"summary": "\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "--no-process-toast"}}, {"summary": "\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "--no-truncate"}}, {"summary": "\u6307\u5b9a \u5e76\u884c\u6e05\u7406 \u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-P parallel_workers --parallel= parallel_workers"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "--skip-locked"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u7c7b\u4f3c --analyze-only \uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1 default_statistics_target \uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/19/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}, {"name": "PG_COLOR", "description": "\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a always \u3001 auto \u548c never \u3002"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/19/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "signature": "--buffer-usage-limit size", "source_url": "/docs/19/app-vacuumdb.html", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "summary": "Disable skipping pages based on the contents of the visibility map.", "signature": "--disable-page-skipping", "source_url": "/docs/19/app-vacuumdb.html", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["--dry-run"], "summary": "Print, but do not execute, the vacuum and analyze commands that would have been sent to the server.", "signature": "--dry-run", "source_url": "/docs/19/app-vacuumdb.html", "description": "Print, but do not execute, the vacuum and analyze commands that would have been sent to the server."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/19/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/19/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/19/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "summary": "Always remove index entries pointing to dead tuples.", "signature": "--force-index-cleanup", "source_url": "/docs/19/app-vacuumdb.html", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/19/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "signature": "--min-mxid-age mxid_age", "source_url": "/docs/19/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "signature": "--min-xid-age xid_age", "source_url": "/docs/19/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--missing-stats-only"], "summary": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices.", "signature": "--missing-stats-only", "source_url": "/docs/19/app-vacuumdb.html", "description": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices. This option can only be used in conjunction with --analyze-only or --analyze-in-stages . Note that --missing-stats-only requires SELECT privileges on pg_statistic and pg_statistic_ext_data , which are restricted to superusers by default."}, {"names": ["-n schema", "--schema= schema"], "summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "signature": "-n schema --schema= schema", "source_url": "/docs/19/app-vacuumdb.html", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "signature": "-N schema --exclude-schema= schema", "source_url": "/docs/19/app-vacuumdb.html", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "summary": "Do not remove index entries pointing to dead tuples.", "signature": "--no-index-cleanup", "source_url": "/docs/19/app-vacuumdb.html", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "summary": "Skip the main relation.", "signature": "--no-process-main", "source_url": "/docs/19/app-vacuumdb.html", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "summary": "Skip the TOAST table associated with the table to vacuum, if any.", "signature": "--no-process-toast", "source_url": "/docs/19/app-vacuumdb.html", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "summary": "Do not truncate empty pages at the end of the table.", "signature": "--no-truncate", "source_url": "/docs/19/app-vacuumdb.html", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "signature": "-P parallel_workers --parallel= parallel_workers", "source_url": "/docs/19/app-vacuumdb.html", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/19/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "summary": "Skip relations that cannot be immediately locked for processing.", "signature": "--skip-locked", "source_url": "/docs/19/app-vacuumdb.html", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/19/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. If no tables are specified with the --table option, vacuumdb will clean all regular tables and materialized views in the connected database. If --analyze-only or --analyze-in-stages is also specified, it will analyze all regular tables, partitioned tables, and materialized views (but not foreign tables). Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/19/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/19/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/19/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/19/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "signature": "--analyze-in-stages", "source_url": "/docs/19/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/19/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/19/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/19/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/19/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/19/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/19/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/19/app-vacuumdb.html", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/source/v19beta4/postgresql-19beta4.tar.bz2", "label": "19beta4", "major": "19", "channel": "preview", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/19/postgresql-19-A4.pdf", "bytes": 16064841, "pages": 3052, "sha256": "4dd099e4125c591128fc5f3ebd02178dc24781f9e5ae629f96d67c4c8547427b", "built_at": "2026-09-26"}, "US": {"url": "/files/documentation/pdf/19/postgresql-19-US.pdf", "bytes": 15974616, "pages": 3225, "sha256": "61971fa857f0956d47341a0388fa6af9ae10acf691d4b2fc009007d384b0342b", "built_at": "2026-09-26"}}, "tree": "19", "index": "index.html", "major": "19", "pages": 1155, "release": "19beta4", "source_url": "https://ftp.postgresql.org/pub/source/v19beta4/postgresql-19beta4.tar.bz2", "svg_assets": 5, "source_mode": "en SGML built with pinned official archive", "source_sha256": "83157ee9c599d03b2f7a3d73ef3a56ec24e0e79cc2b3501a64d1364f56398c86"}, "revision": "1bbbbf4133d426f0e4304010688d2984c30fb67df0cc3a61b3e37eb3f6f37833", "evidence_kind": "English manual and source declarations", "source_sha256": "83157ee9c599d03b2f7a3d73ef3a56ec24e0e79cc2b3501a64d1364f56398c86"}, "sources": [{"url": "https://pg.center/docs/19/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "19beta4 English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "0c36972f8ccdb1b728004a601ad17ec165e2b0b955dcfaea0d84a5ad3e868dbc", "language": "en", "original_url": "/docs/19/app-vacuumdb.html"}, {"url": "https://pg.center/docs/19/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "c827f460db781b39da305303c88e73729a419cd2b2b9dedb126d8ad5cbf02c95", "language": "en", "original_url": "/docs/19/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]\nvacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]\nvacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-n</code> | <code class=\"option\">--schema</code> <em class=\"replaceable\"><code>schema</code></em> ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.3\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-N</code> | <code class=\"option\">--exclude-schema</code> <em class=\"replaceable\"><code>schema</code></em> ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f SQL \u547d\u4ee4 <a class=\"link\" href=\"/docs/19/sql-vacuum.html\" title=\"VACUUM\"><code class=\"command\">VACUUM</code></a> \u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--buffer-usage-limit <em class=\"replaceable\"><code>size</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e3a\u4e00\u6b21\u7ed9\u5b9a\u7684 <span class=\"application\">vacuumdb</span> \u8c03\u7528\u6307\u5b9a<a class=\"glossterm\" href=\"/docs/19/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\"></a><a class=\"glossterm\" href=\"/docs/19/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\" title=\"\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\">\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\uff08Buffer Access Strategy\uff09</a>\u73af\u5f62\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e2a\u5927\u5c0f\u7528\u4e8e\u8ba1\u7b97\u5c06\u4f5c\u4e3a\u8be5\u7b56\u7565\u4e00\u90e8\u5206\u88ab\u91cd\u7528\u7684\u5171\u4eab\u7f13\u51b2\u533a\u6570\u91cf\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/19/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/19/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--disable-page-skipping</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--dry-run</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6253\u5370\u51fa\u6765\uff0c\u4f46\u4e0d\u6267\u884c\u539f\u672c\u8981\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u6e05\u7406\u548c\u5206\u6790\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--force-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/19/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u56e0\u6b7b\u9501\u800c\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-mxid-age <em class=\"replaceable\"><code>mxid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>mxid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/19/routine-vacuuming.html#VACUUM-FOR-MULTIXACT-WRAPAROUND\" title=\"24.1.5.1.\u00a0\u591a\u4e8b\u52a1\u4e0e\u56de\u5377\">\u7b2c\u00a024.1.5.1\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u591a\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-xid-age <em class=\"replaceable\"><code>xid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>xid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/19/routine-vacuuming.html#VACUUM-FOR-WRAPAROUND\" title=\"24.1.5.\u00a0\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\u5931\u8d25\">\u7b2c\u00a024.1.5\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--missing-stats-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5206\u6790\u90a3\u4e9b\u5728\u5217\u3001\u7d22\u5f15\u8868\u8fbe\u5f0f\u6216\u6269\u5c55\u7edf\u8ba1\u4fe1\u606f\u5bf9\u8c61\u4e0a\u7f3a\u5c11\u7edf\u8ba1\u4fe1\u606f\u7684\u5173\u7cfb\u3002\u4e0e <code class=\"option\">--analyze-in-stages</code> \u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u6b64\u9009\u9879\u53ef\u9632\u6b62 <span class=\"application\">vacuumdb</span> \u4e34\u65f6\u7528\u6309\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\u751f\u6210\u7684\u7edf\u8ba1\u4fe1\u606f\u66ff\u6362\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u4ece\u800c\u907f\u514d\u67e5\u8be2\u4f18\u5316\u5668\u77ed\u6682\u5730\u4f5c\u51fa\u66f4\u5dee\u7684\u9009\u62e9\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u53ea\u80fd\u4e0e <code class=\"option\">--analyze-only</code> \u6216 <code class=\"option\">--analyze-in-stages</code> \u914d\u5408\u4f7f\u7528\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c<code class=\"option\">--missing-stats-only</code> \u8981\u6c42\u62e5\u6709 <code class=\"literal\">SELECT</code> \u6743\u9650\uff0c\u4ee5\u8bbf\u95ee <a class=\"link\" href=\"/docs/19/catalog-pg-statistic.html\" title=\"52.51.\u00a0pg_statistic\"><code class=\"structname\">pg_statistic</code></a> \u548c <a class=\"link\" href=\"/docs/19/catalog-pg-statistic-ext-data.html\" title=\"52.53.\u00a0pg_statistic_ext_data\"><code class=\"structname\">pg_statistic_ext_data</code></a>\uff0c\u800c\u8fd9\u4e9b\u6743\u9650\u9ed8\u8ba4\u53ea\u6388\u4e88\u8d85\u7ea7\u7528\u6237\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-n <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-n</code> \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-N <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--exclude-schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-N</code> \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-main</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-toast</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-truncate</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-P <em class=\"replaceable\"><code>parallel_workers</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--parallel=<em class=\"replaceable\"><code>parallel_workers</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a<em class=\"firstterm\">\u5e76\u884c\u6e05\u7406</em>\u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/19/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--skip-locked</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<p lang=\"zh\">\u5982\u679c\u672a\u4f7f\u7528 <code class=\"option\">--table</code> \u9009\u9879\u6307\u5b9a\u4efb\u4f55\u8868\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u6e05\u7406\u5f53\u524d\u8fde\u63a5\u6570\u636e\u5e93\u4e2d\u7684\u6240\u6709\u666e\u901a\u8868\u548c\u7269\u5316\u89c6\u56fe\u3002\u5982\u679c\u8fd8\u6307\u5b9a\u4e86 <code class=\"option\">--analyze-only</code> \u6216 <code class=\"option\">--analyze-in-stages</code>\uff0c\u5b83\u4f1a\u5206\u6790\u6240\u6709\u666e\u901a\u8868\u3001\u5206\u533a\u8868\u548c\u7269\u5316\u89c6\u56fe\uff08\u4f46\u4e0d\u5305\u62ec\u5916\u90e8\u8868\uff09\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u7c7b\u4f3c <code class=\"option\">--analyze-only</code>\uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1<a class=\"xref\" href=\"/docs/19/runtime-config-query.html#GUC-DEFAULT-STATISTICS-TARGET\">default_statistics_target</a>\uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u5728\u5206\u6790\u5f53\u524d\u6ca1\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u6216\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\u5b8c\u5168\u9519\u8bef\u7684\u6570\u636e\u5e93\u65f6\u624d\u6709\u7528\uff0c\u4f8b\u5982\u6570\u636e\u5e93\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u91cd\u65b0\u586b\u5145\uff0c\u6216\u521a\u901a\u8fc7 <code class=\"command\">pg_upgrade</code> \u5347\u7ea7\u5f97\u5230\u3002\u6ce8\u610f\uff0c\u5728\u5df2\u6709\u7edf\u8ba1\u4fe1\u606f\u7684\u6570\u636e\u5e93\u4e0a\u4f7f\u7528\u6b64\u9009\u9879\uff0c\u53ef\u80fd\u4f1a\u56e0\u4e3a\u65e9\u671f\u9636\u6bb5\u91c7\u7528\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\uff0c\u5bfc\u81f4\u67e5\u8be2\u4f18\u5316\u5668\u7684\u9009\u62e9\u6682\u65f6\u53d8\u5dee\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/19/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"envar\">PG_COLOR</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a <code class=\"literal\">always</code>\u3001<code class=\"literal\">auto</code>\u548c <code class=\"literal\">never</code>\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/19/libpq-envars.html\" title=\"32.15.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a032.15\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u679c\u9047\u5230\u95ee\u9898\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/19/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/19/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span>\u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.9\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d foo \u548c bar \u6a21\u5f0f\u5185\u7684\u6240\u6709\u8868\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --schema='foo' --schema='bar' xyzzy</code></strong>\n</pre>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.10\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2><span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/19/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span>\n</div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/19/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "85abb9598054d454ef7e9e1db7732654b82e1439b77f8360b846fa9846f7170f", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[29]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[31]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[35]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[37]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[39]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[41]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]/div[2]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]/div[2]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[47]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[49]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[51]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[53]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[55]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[55]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[57]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[0]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[1]", "#APP-VACUUMDB/div[5]/p[1]", "#APP-VACUUMDB/div[5]/p[3]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[1]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[3]", "#APP-VACUUMDB/div[6]/h2[0]", "#APP-VACUUMDB/div[6]/p[2]", "#APP-VACUUMDB/div[7]/h2[0]", "#APP-VACUUMDB/div[7]/p[1]", "#APP-VACUUMDB/div[8]/h2[0]", "#APP-VACUUMDB/div[8]/p[1]", "#APP-VACUUMDB/div[8]/p[3]", "#APP-VACUUMDB/div[9]/h2[0]"]}], "language": "zh", "original_text": {"/versions/19/description/0": "vacuumdb \u2014 garbage-collect and analyze a PostgreSQL database", "/versions/19/facts/0/label": "Documented executable", "/versions/19/facts/1/label": "Executable version", "/versions/19/facts/2/label": "Reference inventory", "/versions/19/facts/2/value": "Client applications", "/versions/19/facts/3/label": "Option definition groups", "/versions/19/tables/0/title": "Documented options", "/versions/19/tables/1/title": "Environment variables", "/versions/19/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/19/tables/0/rows/1/summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "/versions/19/tables/0/rows/2/summary": "Disable skipping pages based on the contents of the visibility map.", "/versions/19/tables/0/rows/3/summary": "Print, but do not execute, the vacuum and analyze commands that would have been sent to the server.", "/versions/19/tables/0/rows/4/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/19/tables/0/rows/5/summary": "Perform \u201c full \u201d vacuuming.", "/versions/19/tables/0/rows/6/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/19/tables/0/rows/7/summary": "Always remove index entries pointing to dead tuples.", "/versions/19/tables/0/rows/8/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "/versions/19/tables/0/rows/9/summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "/versions/19/tables/0/columns/0/label": "Option and arguments", "/versions/19/tables/0/columns/1/label": "Description", "/versions/19/tables/0/rows/10/summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "/versions/19/tables/0/rows/11/summary": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices.", "/versions/19/tables/0/rows/12/summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "/versions/19/tables/0/rows/13/summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "/versions/19/tables/0/rows/14/summary": "Do not remove index entries pointing to dead tuples.", "/versions/19/tables/0/rows/15/summary": "Skip the main relation.", "/versions/19/tables/0/rows/16/summary": "Skip the TOAST table associated with the table to vacuum, if any.", "/versions/19/tables/0/rows/17/summary": "Do not truncate empty pages at the end of the table.", "/versions/19/tables/0/rows/18/summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "/versions/19/tables/0/rows/19/summary": "Do not display progress messages.", "/versions/19/tables/0/rows/20/summary": "Skip relations that cannot be immediately locked for processing.", "/versions/19/tables/0/rows/21/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/19/tables/0/rows/22/summary": "Print detailed information during processing.", "/versions/19/tables/0/rows/23/summary": "Print the vacuumdb version and exit.", "/versions/19/tables/0/rows/24/summary": "Also calculate statistics for use by the optimizer.", "/versions/19/tables/0/rows/25/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/19/tables/0/rows/26/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "/versions/19/tables/0/rows/27/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/19/tables/0/rows/28/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/19/tables/0/rows/29/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/19/tables/0/rows/30/summary": "User name to connect as.", "/versions/19/tables/0/rows/31/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/19/tables/0/rows/32/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/19/tables/0/rows/33/summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/19/tables/1/columns/0/label": "Variable", "/versions/19/tables/1/columns/1/label": "Meaning", "/versions/19/tables/1/rows/0/description": "Default connection parameters", "/versions/19/tables/1/rows/1/description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "ee2338e216990dee2d06413af5c0666b11c8945d9abf09e095c3cc7bb10332ed"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "signature": "--buffer-usage-limit size", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "signature": "--disable-page-skipping", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["--dry-run"], "signature": "--dry-run", "description": "Print, but do not execute, the vacuum and analyze commands that would have been sent to the server."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "signature": "--force-index-cleanup", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "signature": "--min-mxid-age mxid_age", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "signature": "--min-xid-age xid_age", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--missing-stats-only"], "signature": "--missing-stats-only", "description": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices. This option can only be used in conjunction with --analyze-only or --analyze-in-stages . Note that --missing-stats-only requires SELECT privileges on pg_statistic and pg_statistic_ext_data , which are restricted to superusers by default."}, {"names": ["-n schema", "--schema= schema"], "signature": "-n schema --schema= schema", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "signature": "-N schema --exclude-schema= schema", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "signature": "--no-index-cleanup", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "signature": "--no-process-main", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "signature": "--no-process-toast", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "signature": "--no-truncate", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "signature": "-P parallel_workers --parallel= parallel_workers", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "signature": "--skip-locked", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. If no tables are specified with the --table option, vacuumdb will clean all regular tables and materialized views in the connected database. If --analyze-only or --analyze-in-stages is also specified, it will analyze all regular tables, partitioned tables, and materialized views (but not foreign tables). Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}]}, "comparison_hash": "6ed3ee2e55e1fd3f499e425488191c60fd5704f029fed2721fc99eb72e8c754b", "manual_language": "zh"}, "20": {"facts": [{"label": "\u624b\u518c\u4e2d\u7684\u53ef\u6267\u884c\u7a0b\u5e8f", "value": "vacuumdb"}, {"label": "\u7a0b\u5e8f\u7248\u672c", "value": "20devel"}, {"label": "\u53c2\u8003\u6e05\u5355", "value": "\u5ba2\u6237\u7aef\u7a0b\u5e8f"}, {"label": "\u9009\u9879\u5b9a\u4e49\u7ec4", "value": "34"}], "tables": [{"key": "options", "rows": [{"summary": "\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-a --all"}}, {"summary": "\u4e3a\u4e00\u6b21\u7ed9\u5b9a\u7684 vacuumdb \u8c03\u7528\u6307\u5b9a \u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\uff08Buffer Access Strategy\uff09 \u73af\u5f62\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e2a\u5927\u5c0f\u7528\u4e8e\u8ba1\u7b97\u5c06\u4f5c\u4e3a\u8be5\u7b56\u7565\u4e00\u90e8\u5206\u88ab\u91cd\u7528\u7684\u5171\u4eab\u7f13\u51b2\u533a\u6570\u91cf\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--buffer-usage-limit size"}}, {"summary": "\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--disable-page-skipping"}}, {"summary": "\u6253\u5370\u51fa\u6765\uff0c\u4f46\u4e0d\u6267\u884c\u539f\u672c\u8981\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u6e05\u7406\u548c\u5206\u6790\u547d\u4ee4\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--dry-run"}}, {"summary": "\u56de\u663e vacuumdb \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-e --echo"}}, {"summary": "\u6267\u884c \u201c \u5b8c\u5168 \u201d \u6e05\u7406\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-f --full"}}, {"summary": "\u6fc0\u8fdb\u5730 \u201c \u51bb\u7ed3 \u201d \u5143\u7ec4\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-F --freeze"}}, {"summary": "\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--force-index-cleanup"}}, {"summary": "\u901a\u8fc7\u540c\u65f6\u8fd0\u884c njobs \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-j njobs --jobs= njobs"}}, {"summary": "\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a mxid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5.1 \u8282 \uff09\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--min-mxid-age mxid_age"}}, {"summary": "\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a xid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5 \u8282 \uff09\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--min-xid-age xid_age"}}, {"summary": "\u4ec5\u5206\u6790\u90a3\u4e9b\u5728\u5217\u3001\u7d22\u5f15\u8868\u8fbe\u5f0f\u6216\u6269\u5c55\u7edf\u8ba1\u4fe1\u606f\u5bf9\u8c61\u4e0a\u7f3a\u5c11\u7edf\u8ba1\u4fe1\u606f\u7684\u5173\u7cfb\u3002\u4e0e --analyze-in-stages \u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u6b64\u9009\u9879\u53ef\u9632\u6b62 vacuumdb \u4e34\u65f6\u7528\u6309\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\u751f\u6210\u7684\u7edf\u8ba1\u4fe1\u606f\u66ff\u6362\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u4ece\u800c\u907f\u514d\u67e5\u8be2\u4f18\u5316\u5668\u77ed\u6682\u5730\u4f5c\u51fa\u66f4\u5dee\u7684\u9009\u62e9\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--missing-stats-only"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -n \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-n schema --schema= schema"}}, {"summary": "\u4e0d\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -N \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-N schema --exclude-schema= schema"}}, {"summary": "\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--no-index-cleanup"}}, {"summary": "\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--no-process-main"}}, {"summary": "\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--no-process-toast"}}, {"summary": "\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--no-truncate"}}, {"summary": "\u6307\u5b9a \u5e76\u884c\u6e05\u7406 \u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-P parallel_workers --parallel= parallel_workers"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--skip-locked"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u7c7b\u4f3c --analyze-only \uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1 default_statistics_target \uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/devel/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}, {"name": "PG_COLOR", "description": "\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a always \u3001 auto \u548c never \u3002"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "signature": "--buffer-usage-limit size", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "summary": "Disable skipping pages based on the contents of the visibility map.", "signature": "--disable-page-skipping", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["--dry-run"], "summary": "Print, but do not execute, the vacuum and analyze commands that would have been sent to the server.", "signature": "--dry-run", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Print, but do not execute, the vacuum and analyze commands that would have been sent to the server."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "summary": "Always remove index entries pointing to dead tuples.", "signature": "--force-index-cleanup", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "signature": "--min-mxid-age mxid_age", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "signature": "--min-xid-age xid_age", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--missing-stats-only"], "summary": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices.", "signature": "--missing-stats-only", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices. This option can only be used in conjunction with --analyze-only or --analyze-in-stages . Note that --missing-stats-only requires SELECT privileges on pg_statistic and pg_statistic_ext_data , which are restricted to superusers by default."}, {"names": ["-n schema", "--schema= schema"], "summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "signature": "-n schema --schema= schema", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "signature": "-N schema --exclude-schema= schema", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "summary": "Do not remove index entries pointing to dead tuples.", "signature": "--no-index-cleanup", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "summary": "Skip the main relation.", "signature": "--no-process-main", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "summary": "Skip the TOAST table associated with the table to vacuum, if any.", "signature": "--no-process-toast", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "summary": "Do not truncate empty pages at the end of the table.", "signature": "--no-truncate", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "signature": "-P parallel_workers --parallel= parallel_workers", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "summary": "Skip relations that cannot be immediately locked for processing.", "signature": "--skip-locked", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. If no tables are specified with the --table option, vacuumdb will clean all regular tables and materialized views in the connected database. If --analyze-only or --analyze-in-stages is also specified, it will analyze all regular tables, partitioned tables, and materialized views (but not foreign tables). Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "signature": "--analyze-in-stages", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/devel/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/devel/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/devel/app-vacuumdb.html", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/snapshot/dev/postgresql-snapshot.tar.bz2", "label": "20devel", "major": "20", "channel": "devel", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/20/postgresql-20-A4.pdf", "bytes": 16030631, "pages": 3052, "sha256": "bd5d82c0ce38fc18f92a0447818a91a193a261776bca1c37564bf9a683e177d0", "built_at": "2026-09-28"}, "US": {"url": "/files/documentation/pdf/20/postgresql-20-US.pdf", "bytes": 15936613, "pages": 3223, "sha256": "d97d9e0db479a02f4234b175f50fcad70c3661619afc8d6df9b9437882e3c299", "built_at": "2026-09-28"}}, "tree": "0", "index": "index.html", "major": "20", "pages": 1156, "release": "20devel", "source_url": "https://ftp.postgresql.org/pub/snapshot/dev/postgresql-snapshot.tar.bz2", "svg_assets": 6, "source_mode": "en SGML built with pinned official archive", "source_sha256": "4d3346909b201ac1648232cf290462a7070c119326f56196f1f0253ed80fae41", "source_snapshot_utc": "26-Sep-2026 20:22"}, "revision": "2eba5e0fd4c3bffb2803247b6cd537878e9d6ee5a6dfbe3c50ece8b421b80918", "evidence_kind": "English manual and source declarations", "source_sha256": "4d3346909b201ac1648232cf290462a7070c119326f56196f1f0253ed80fae41"}, "sources": [{"url": "https://pg.center/docs/devel/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "20devel English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "16af293ac39e43feb6337209eff3666a81d72ae1fe5c23594b88c9d5642dd55b", "language": "en", "original_url": "/docs/devel/app-vacuumdb.html"}, {"url": "https://pg.center/docs/devel/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "a6c7ba748fa1d9feac5bb7cde41d1d36a1f4c26d5963e07fb103d02918b2a8ca", "language": "en", "original_url": "/docs/devel/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]\nvacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]\nvacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-n</code> | <code class=\"option\">--schema</code> <em class=\"replaceable\"><code>schema</code></em> ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.3\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-N</code> | <code class=\"option\">--exclude-schema</code> <em class=\"replaceable\"><code>schema</code></em> ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f SQL \u547d\u4ee4 <a class=\"link\" href=\"/docs/devel/sql-vacuum.html\" title=\"VACUUM\"><code class=\"command\">VACUUM</code></a> \u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--buffer-usage-limit <em class=\"replaceable\"><code>size</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e3a\u4e00\u6b21\u7ed9\u5b9a\u7684 <span class=\"application\">vacuumdb</span> \u8c03\u7528\u6307\u5b9a<a class=\"glossterm\" href=\"/docs/devel/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\"></a><a class=\"glossterm\" href=\"/docs/devel/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\" title=\"\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\">\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\uff08Buffer Access Strategy\uff09</a>\u73af\u5f62\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e2a\u5927\u5c0f\u7528\u4e8e\u8ba1\u7b97\u5c06\u4f5c\u4e3a\u8be5\u7b56\u7565\u4e00\u90e8\u5206\u88ab\u91cd\u7528\u7684\u5171\u4eab\u7f13\u51b2\u533a\u6570\u91cf\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/devel/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/devel/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--disable-page-skipping</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--dry-run</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6253\u5370\u51fa\u6765\uff0c\u4f46\u4e0d\u6267\u884c\u539f\u672c\u8981\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u6e05\u7406\u548c\u5206\u6790\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--force-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/devel/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u56e0\u6b7b\u9501\u800c\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-mxid-age <em class=\"replaceable\"><code>mxid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>mxid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/devel/routine-vacuuming.html#VACUUM-FOR-MULTIXACT-WRAPAROUND\" title=\"24.1.5.1.\u00a0\u591a\u4e8b\u52a1\u4e0e\u56de\u5377\">\u7b2c\u00a024.1.5.1\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u591a\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-xid-age <em class=\"replaceable\"><code>xid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>xid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/devel/routine-vacuuming.html#VACUUM-FOR-WRAPAROUND\" title=\"24.1.5.\u00a0\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\u5931\u8d25\">\u7b2c\u00a024.1.5\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--missing-stats-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5206\u6790\u90a3\u4e9b\u5728\u5217\u3001\u7d22\u5f15\u8868\u8fbe\u5f0f\u6216\u6269\u5c55\u7edf\u8ba1\u4fe1\u606f\u5bf9\u8c61\u4e0a\u7f3a\u5c11\u7edf\u8ba1\u4fe1\u606f\u7684\u5173\u7cfb\u3002\u4e0e <code class=\"option\">--analyze-in-stages</code> \u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u6b64\u9009\u9879\u53ef\u9632\u6b62 <span class=\"application\">vacuumdb</span> \u4e34\u65f6\u7528\u6309\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\u751f\u6210\u7684\u7edf\u8ba1\u4fe1\u606f\u66ff\u6362\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u4ece\u800c\u907f\u514d\u67e5\u8be2\u4f18\u5316\u5668\u77ed\u6682\u5730\u4f5c\u51fa\u66f4\u5dee\u7684\u9009\u62e9\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u53ea\u80fd\u4e0e <code class=\"option\">--analyze-only</code> \u6216 <code class=\"option\">--analyze-in-stages</code> \u914d\u5408\u4f7f\u7528\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c<code class=\"option\">--missing-stats-only</code> \u8981\u6c42\u62e5\u6709 <code class=\"literal\">SELECT</code> \u6743\u9650\uff0c\u4ee5\u8bbf\u95ee <a class=\"link\" href=\"/docs/devel/catalog-pg-statistic.html\" title=\"52.51.\u00a0pg_statistic\"><code class=\"structname\">pg_statistic</code></a> \u548c <a class=\"link\" href=\"/docs/devel/catalog-pg-statistic-ext-data.html\" title=\"52.53.\u00a0pg_statistic_ext_data\"><code class=\"structname\">pg_statistic_ext_data</code></a>\uff0c\u800c\u8fd9\u4e9b\u6743\u9650\u9ed8\u8ba4\u53ea\u6388\u4e88\u8d85\u7ea7\u7528\u6237\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-n <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-n</code> \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-N <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--exclude-schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-N</code> \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-main</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-toast</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-truncate</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-P <em class=\"replaceable\"><code>parallel_workers</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--parallel=<em class=\"replaceable\"><code>parallel_workers</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a<em class=\"firstterm\">\u5e76\u884c\u6e05\u7406</em>\u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/devel/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--skip-locked</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<p lang=\"zh\">\u5982\u679c\u672a\u4f7f\u7528 <code class=\"option\">--table</code> \u9009\u9879\u6307\u5b9a\u4efb\u4f55\u8868\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u6e05\u7406\u5f53\u524d\u8fde\u63a5\u6570\u636e\u5e93\u4e2d\u7684\u6240\u6709\u666e\u901a\u8868\u548c\u7269\u5316\u89c6\u56fe\u3002\u5982\u679c\u8fd8\u6307\u5b9a\u4e86 <code class=\"option\">--analyze-only</code> \u6216 <code class=\"option\">--analyze-in-stages</code>\uff0c\u5b83\u4f1a\u5206\u6790\u6240\u6709\u666e\u901a\u8868\u3001\u5206\u533a\u8868\u548c\u7269\u5316\u89c6\u56fe\uff08\u4f46\u4e0d\u5305\u62ec\u5916\u90e8\u8868\uff09\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u7c7b\u4f3c <code class=\"option\">--analyze-only</code>\uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1<a class=\"xref\" href=\"/docs/devel/runtime-config-query.html#GUC-DEFAULT-STATISTICS-TARGET\">default_statistics_target</a>\uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u5728\u5206\u6790\u5f53\u524d\u6ca1\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u6216\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\u5b8c\u5168\u9519\u8bef\u7684\u6570\u636e\u5e93\u65f6\u624d\u6709\u7528\uff0c\u4f8b\u5982\u6570\u636e\u5e93\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u91cd\u65b0\u586b\u5145\uff0c\u6216\u521a\u901a\u8fc7 <code class=\"command\">pg_upgrade</code> \u5347\u7ea7\u5f97\u5230\u3002\u6ce8\u610f\uff0c\u5728\u5df2\u6709\u7edf\u8ba1\u4fe1\u606f\u7684\u6570\u636e\u5e93\u4e0a\u4f7f\u7528\u6b64\u9009\u9879\uff0c\u53ef\u80fd\u4f1a\u56e0\u4e3a\u65e9\u671f\u9636\u6bb5\u91c7\u7528\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\uff0c\u5bfc\u81f4\u67e5\u8be2\u4f18\u5316\u5668\u7684\u9009\u62e9\u6682\u65f6\u53d8\u5dee\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/devel/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"envar\">PG_COLOR</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a <code class=\"literal\">always</code>\u3001<code class=\"literal\">auto</code>\u548c <code class=\"literal\">never</code>\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/devel/libpq-envars.html\" title=\"32.14.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a032.14\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u679c\u9047\u5230\u95ee\u9898\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/devel/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/devel/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span>\u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.9\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d foo \u548c bar \u6a21\u5f0f\u5185\u7684\u6240\u6709\u8868\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --schema='foo' --schema='bar' xyzzy</code></strong>\n</pre>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.10\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2><span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/devel/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span>\n</div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/devel/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "8a256d5589ab208445de9b7266dfba50e4afa902243f899c41932e449f0c7356", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]", 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"#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]/div[2]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]/div[2]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[47]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[49]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[51]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[53]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[55]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[55]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[57]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[0]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[1]", "#APP-VACUUMDB/div[5]/p[1]", "#APP-VACUUMDB/div[5]/p[3]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[1]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[3]", "#APP-VACUUMDB/div[6]/h2[0]", "#APP-VACUUMDB/div[6]/p[2]", "#APP-VACUUMDB/div[7]/h2[0]", "#APP-VACUUMDB/div[7]/p[1]", "#APP-VACUUMDB/div[8]/h2[0]", "#APP-VACUUMDB/div[8]/p[1]", "#APP-VACUUMDB/div[8]/p[3]", "#APP-VACUUMDB/div[9]/h2[0]"]}], "language": "zh", "original_text": {"/summary": "vacuumdb \u2014 garbage-collect and analyze a PostgreSQL database", "/category": "Client applications", "/versions/20/description/0": "vacuumdb \u2014 garbage-collect and analyze a PostgreSQL database", "/versions/20/facts/0/label": "Documented executable", "/versions/20/facts/1/label": "Executable version", "/versions/20/facts/2/label": "Reference inventory", "/versions/20/facts/2/value": "Client applications", "/versions/20/facts/3/label": "Option definition groups", "/versions/20/tables/0/title": "Documented options", "/versions/20/tables/1/title": "Environment variables", "/versions/20/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/20/tables/0/rows/1/summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "/versions/20/tables/0/rows/2/summary": "Disable skipping pages based on the contents of the visibility map.", "/versions/20/tables/0/rows/3/summary": "Print, but do not execute, the vacuum and analyze commands that would have been sent to the server.", "/versions/20/tables/0/rows/4/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/20/tables/0/rows/5/summary": "Perform \u201c full \u201d vacuuming.", "/versions/20/tables/0/rows/6/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/20/tables/0/rows/7/summary": "Always remove index entries pointing to dead tuples.", "/versions/20/tables/0/rows/8/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "/versions/20/tables/0/rows/9/summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "/versions/20/tables/0/columns/0/label": "Option and arguments", "/versions/20/tables/0/columns/1/label": "Description", "/versions/20/tables/0/rows/10/summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "/versions/20/tables/0/rows/11/summary": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices.", "/versions/20/tables/0/rows/12/summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "/versions/20/tables/0/rows/13/summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "/versions/20/tables/0/rows/14/summary": "Do not remove index entries pointing to dead tuples.", "/versions/20/tables/0/rows/15/summary": "Skip the main relation.", "/versions/20/tables/0/rows/16/summary": "Skip the TOAST table associated with the table to vacuum, if any.", "/versions/20/tables/0/rows/17/summary": "Do not truncate empty pages at the end of the table.", "/versions/20/tables/0/rows/18/summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "/versions/20/tables/0/rows/19/summary": "Do not display progress messages.", "/versions/20/tables/0/rows/20/summary": "Skip relations that cannot be immediately locked for processing.", "/versions/20/tables/0/rows/21/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/20/tables/0/rows/22/summary": "Print detailed information during processing.", "/versions/20/tables/0/rows/23/summary": "Print the vacuumdb version and exit.", "/versions/20/tables/0/rows/24/summary": "Also calculate statistics for use by the optimizer.", "/versions/20/tables/0/rows/25/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/20/tables/0/rows/26/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "/versions/20/tables/0/rows/27/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/20/tables/0/rows/28/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/20/tables/0/rows/29/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/20/tables/0/rows/30/summary": "User name to connect as.", "/versions/20/tables/0/rows/31/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/20/tables/0/rows/32/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/20/tables/0/rows/33/summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/20/tables/1/columns/0/label": "Variable", "/versions/20/tables/1/columns/1/label": "Meaning", "/versions/20/tables/1/rows/0/description": "Default connection parameters", "/versions/20/tables/1/rows/1/description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "221eac08457ee47d961b9d57263b5a74e4c4ebfb30f44c11a400c9781c85e64c"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "signature": "--buffer-usage-limit size", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "signature": "--disable-page-skipping", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["--dry-run"], "signature": "--dry-run", "description": "Print, but do not execute, the vacuum and analyze commands that would have been sent to the server."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "signature": "--force-index-cleanup", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "signature": "--min-mxid-age mxid_age", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "signature": "--min-xid-age xid_age", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--missing-stats-only"], "signature": "--missing-stats-only", "description": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices. This option can only be used in conjunction with --analyze-only or --analyze-in-stages . Note that --missing-stats-only requires SELECT privileges on pg_statistic and pg_statistic_ext_data , which are restricted to superusers by default."}, {"names": ["-n schema", "--schema= schema"], "signature": "-n schema --schema= schema", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "signature": "-N schema --exclude-schema= schema", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "signature": "--no-index-cleanup", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "signature": "--no-process-main", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "signature": "--no-process-toast", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "signature": "--no-truncate", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "signature": "-P parallel_workers --parallel= parallel_workers", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "signature": "--skip-locked", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. If no tables are specified with the --table option, vacuumdb will clean all regular tables and materialized views in the connected database. If --analyze-only or --analyze-in-stages is also specified, it will analyze all regular tables, partitioned tables, and materialized views (but not foreign tables). Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}]}, "comparison_hash": "6ed3ee2e55e1fd3f499e425488191c60fd5704f029fed2721fc99eb72e8c754b", "manual_language": "zh"}}}, "snapshot": {"facts": [{"label": "\u624b\u518c\u4e2d\u7684\u53ef\u6267\u884c\u7a0b\u5e8f", "value": "vacuumdb"}, {"label": "\u7a0b\u5e8f\u7248\u672c", "value": "18.6"}, {"label": "\u53c2\u8003\u6e05\u5355", "value": "\u5ba2\u6237\u7aef\u7a0b\u5e8f"}, {"label": "\u9009\u9879\u5b9a\u4e49\u7ec4", "value": "33"}], "tables": [{"key": "options", "rows": [{"summary": "\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-a --all"}}, {"summary": "\u4e3a\u4e00\u6b21\u7ed9\u5b9a\u7684 vacuumdb \u8c03\u7528\u6307\u5b9a \u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\uff08Buffer Access Strategy\uff09 \u73af\u5f62\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e2a\u5927\u5c0f\u7528\u4e8e\u8ba1\u7b97\u5c06\u4f5c\u4e3a\u8be5\u7b56\u7565\u4e00\u90e8\u5206\u88ab\u91cd\u7528\u7684\u5171\u4eab\u7f13\u51b2\u533a\u6570\u91cf\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--buffer-usage-limit size"}}, {"summary": "\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--disable-page-skipping"}}, {"summary": "\u56de\u663e vacuumdb \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-e --echo"}}, {"summary": "\u6267\u884c \u201c \u5b8c\u5168 \u201d \u6e05\u7406\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-f --full"}}, {"summary": "\u6fc0\u8fdb\u5730 \u201c \u51bb\u7ed3 \u201d \u5143\u7ec4\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-F --freeze"}}, {"summary": "\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--force-index-cleanup"}}, {"summary": "\u901a\u8fc7\u540c\u65f6\u8fd0\u884c njobs \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-j njobs --jobs= njobs"}}, {"summary": "\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a mxid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5.1 \u8282 \uff09\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--min-mxid-age mxid_age"}}, {"summary": "\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a xid_age \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1 \u7b2c 24.1.5 \u8282 \uff09\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--min-xid-age xid_age"}}, {"summary": "\u4ec5\u5206\u6790\u90a3\u4e9b\u5728\u5217\u3001\u7d22\u5f15\u8868\u8fbe\u5f0f\u6216\u6269\u5c55\u7edf\u8ba1\u4fe1\u606f\u5bf9\u8c61\u4e0a\u7f3a\u5c11\u7edf\u8ba1\u4fe1\u606f\u7684\u5173\u7cfb\u3002\u4e0e --analyze-in-stages \u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u6b64\u9009\u9879\u53ef\u9632\u6b62 vacuumdb \u4e34\u65f6\u7528\u6309\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\u751f\u6210\u7684\u7edf\u8ba1\u4fe1\u606f\u66ff\u6362\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u4ece\u800c\u907f\u514d\u67e5\u8be2\u4f18\u5316\u5668\u77ed\u6682\u5730\u4f5c\u51fa\u66f4\u5dee\u7684\u9009\u62e9\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--missing-stats-only"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -n \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-n schema --schema= schema"}}, {"summary": "\u4e0d\u6e05\u7406\u6216\u5206\u6790 schema \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -N \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-N schema --exclude-schema= schema"}}, {"summary": "\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--no-index-cleanup"}}, {"summary": "\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--no-process-main"}}, {"summary": "\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--no-process-toast"}}, {"summary": "\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--no-truncate"}}, {"summary": "\u6307\u5b9a \u5e76\u884c\u6e05\u7406 \u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1 VACUUM \u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-P parallel_workers --parallel= parallel_workers"}}, {"summary": "\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-q --quiet"}}, {"summary": "\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--skip-locked"}}, {"summary": "\u4ec5\u6e05\u7406\u6216\u5206\u6790 table \u3002\u53ea\u6709\u4e0e --analyze \u6216 --analyze-only \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a -t \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]"}}, {"summary": "\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-v --verbose"}}, {"summary": "\u8f93\u51fa vacuumdb \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-V --version"}}, {"summary": "\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-z --analyze"}}, {"summary": "\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-Z --analyze-only"}}, {"summary": "\u7c7b\u4f3c --analyze-only \uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1 default_statistics_target \uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--analyze-in-stages"}}, {"summary": "\u663e\u793a vacuumdb \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-? --help"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-h host --host= host"}}, {"summary": "\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-p port --port= port"}}, {"summary": "\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-U username --username= username"}}, {"summary": "\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 .pgpass \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-w --no-password"}}, {"summary": "\u5f3a\u5236 vacuumdb \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "-W --password"}}, {"summary": "\u5f53\u4f7f\u7528 -a / --all \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 postgres \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 template1 \u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a \u8fde\u63a5\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002", "signature": {"url": "/docs/18/app-vacuumdb.html", "text": "--maintenance-db= dbname"}}], "title": "\u624b\u518c\u4e2d\u7684\u9009\u9879", "columns": [{"key": "signature", "label": "\u9009\u9879\u4e0e\u53c2\u6570"}, {"key": "summary", "label": "\u8bf4\u660e"}]}, {"key": "environment", "rows": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570"}, {"name": "PG_COLOR", "description": "\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a always \u3001 auto \u548c never \u3002"}], "title": "\u73af\u5883\u53d8\u91cf", "columns": [{"key": "name", "label": "\u53d8\u91cf"}, {"key": "description", "label": "\u542b\u4e49"}]}], "options": [{"names": ["-a", "--all"], "summary": "Vacuum all databases.", "signature": "-a --all", "source_url": "/docs/18/app-vacuumdb.html", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "signature": "--buffer-usage-limit size", "source_url": "/docs/18/app-vacuumdb.html", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "summary": "Disable skipping pages based on the contents of the visibility map.", "signature": "--disable-page-skipping", "source_url": "/docs/18/app-vacuumdb.html", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["-e", "--echo"], "summary": "Echo the commands that vacuumdb generates and sends to the server.", "signature": "-e --echo", "source_url": "/docs/18/app-vacuumdb.html", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "summary": "Perform \u201c full \u201d vacuuming.", "signature": "-f --full", "source_url": "/docs/18/app-vacuumdb.html", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "summary": "Aggressively \u201c freeze \u201d tuples.", "signature": "-F --freeze", "source_url": "/docs/18/app-vacuumdb.html", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "summary": "Always remove index entries pointing to dead tuples.", "signature": "--force-index-cleanup", "source_url": "/docs/18/app-vacuumdb.html", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "signature": "-j njobs --jobs= njobs", "source_url": "/docs/18/app-vacuumdb.html", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "signature": "--min-mxid-age mxid_age", "source_url": "/docs/18/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "signature": "--min-xid-age xid_age", "source_url": "/docs/18/app-vacuumdb.html", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--missing-stats-only"], "summary": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices.", "signature": "--missing-stats-only", "source_url": "/docs/18/app-vacuumdb.html", "description": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices. This option can only be used in conjunction with --analyze-only or --analyze-in-stages . Note that --missing-stats-only requires SELECT privileges on pg_statistic and pg_statistic_ext_data , which are restricted to superusers by default."}, {"names": ["-n schema", "--schema= schema"], "summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "signature": "-n schema --schema= schema", "source_url": "/docs/18/app-vacuumdb.html", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "signature": "-N schema --exclude-schema= schema", "source_url": "/docs/18/app-vacuumdb.html", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "summary": "Do not remove index entries pointing to dead tuples.", "signature": "--no-index-cleanup", "source_url": "/docs/18/app-vacuumdb.html", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "summary": "Skip the main relation.", "signature": "--no-process-main", "source_url": "/docs/18/app-vacuumdb.html", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "summary": "Skip the TOAST table associated with the table to vacuum, if any.", "signature": "--no-process-toast", "source_url": "/docs/18/app-vacuumdb.html", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "summary": "Do not truncate empty pages at the end of the table.", "signature": "--no-truncate", "source_url": "/docs/18/app-vacuumdb.html", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "signature": "-P parallel_workers --parallel= parallel_workers", "source_url": "/docs/18/app-vacuumdb.html", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "summary": "Do not display progress messages.", "signature": "-q --quiet", "source_url": "/docs/18/app-vacuumdb.html", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "summary": "Skip relations that cannot be immediately locked for processing.", "signature": "--skip-locked", "source_url": "/docs/18/app-vacuumdb.html", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "source_url": "/docs/18/app-vacuumdb.html", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "summary": "Print detailed information during processing.", "signature": "-v --verbose", "source_url": "/docs/18/app-vacuumdb.html", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "summary": "Print the vacuumdb version and exit.", "signature": "-V --version", "source_url": "/docs/18/app-vacuumdb.html", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "summary": "Also calculate statistics for use by the optimizer.", "signature": "-z --analyze", "source_url": "/docs/18/app-vacuumdb.html", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "summary": "Only calculate statistics for use by the optimizer (no vacuum).", "signature": "-Z --analyze-only", "source_url": "/docs/18/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "signature": "--analyze-in-stages", "source_url": "/docs/18/app-vacuumdb.html", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "summary": "Show help about vacuumdb command line arguments, and exit.", "signature": "-? --help", "source_url": "/docs/18/app-vacuumdb.html", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "signature": "-h host --host= host", "source_url": "/docs/18/app-vacuumdb.html", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "signature": "-p port --port= port", "source_url": "/docs/18/app-vacuumdb.html", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "summary": "User name to connect as.", "signature": "-U username --username= username", "source_url": "/docs/18/app-vacuumdb.html", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "signature": "-w --no-password", "source_url": "/docs/18/app-vacuumdb.html", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "summary": "Force vacuumdb to prompt for a password before connecting to a database.", "signature": "-W --password", "source_url": "/docs/18/app-vacuumdb.html", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "signature": "--maintenance-db= dbname", "source_url": "/docs/18/app-vacuumdb.html", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "related": [], "release": {"ref": "https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2", "label": "18.6", "major": "18", "channel": "stable", "manifest": {"pdf": {"A4": {"url": "/files/documentation/pdf/18/postgresql-18-A4.pdf", "bytes": 15865106, "pages": 3154, "sha256": "19512c405da53f9f7fcf0abba359223aa65f021be025bf3411381918f92e3190", "built_at": "2026-09-26"}, "US": {"url": "/files/documentation/pdf/18/postgresql-18-US.pdf", "bytes": 15748059, "pages": 3328, "sha256": "facbe6c229e598b872d3d98bef53308f46e06746006fa4590de9a7de9dd46319", "built_at": "2026-09-26"}}, "tree": "18", "index": "index.html", "major": "18", "pages": 1148, "release": "18.6", "source_url": "https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2", "svg_assets": 3, "source_mode": "en SGML built with pinned official archive", "source_sha256": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "revision": "ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8", "evidence_kind": "English manual and source declarations", "source_sha256": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "sources": [{"url": "https://pg.center/docs/18/app-vacuumdb.html", "file": "app-vacuumdb.html", "label": "18.6 English manual \u00b7 app-vacuumdb.html", "anchor": "", "sha256": "bf6a6504348c7e0f81a39c49654524dcfebfc8f0ff7340d492daf13c64f76eb9", "language": "en", "original_url": "/docs/18/app-vacuumdb.html"}, {"url": "https://pg.center/docs/18/reference-client.html", "file": "reference-client.html", "label": "Client applications inventory", "anchor": "", "sha256": "68f726af77272fe73a827be2b7b5958d0f2239a6f8ed44264e9d42496bfa4fd0", "language": "en", "original_url": "/docs/18/reference-client.html"}], "sections": [], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]"], "signature": "vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]\nvacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]\nvacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]", "description": ["vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}], "manual_html": "<div><div class=\"refentry\" id=\"APP-VACUUMDB\">\n<div class=\"titlepage\"></div>\n<div class=\"refnamediv\">\n<h2><span class=\"refentrytitle\"><span class=\"application\">vacuumdb</span></span></h2>\n<p lang=\"zh\">vacuumdb \u2014 \u6e05\u7406\u5e76\u5206\u6790\u4e00\u4e2a <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93</p>\n</div>\n<div class=\"refsynopsisdiv\">\n<h2 lang=\"zh\">\u5927\u7eb2</h2>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.1\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-t</code> | <code class=\"option\">--table</code> <em class=\"replaceable\"><code>table</code></em> [( <em class=\"replaceable\"><code>column</code></em> [,...] )] ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.2\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-n</code> | <code class=\"option\">--schema</code> <em class=\"replaceable\"><code>schema</code></em> ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n<div class=\"cmdsynopsis\">\n<p id=\"id-1.9.4.23.4.3\"><code class=\"command\">vacuumdb</code> [<em class=\"replaceable\"><code>connection-option</code></em>...] [<em class=\"replaceable\"><code>option</code></em>...] [ <code class=\"option\">-N</code> | <code class=\"option\">--exclude-schema</code> <em class=\"replaceable\"><code>schema</code></em> ] ... [ <em class=\"replaceable\"><code>dbname</code></em> | <code class=\"option\">-a</code> | <code class=\"option\">--all</code> ]</p>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.5\">\n<h2 lang=\"zh\">\u8bf4\u660e</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f\u7528\u4e8e\u6e05\u7406 <span class=\"productname\">PostgreSQL</span> \u6570\u636e\u5e93\u7684\u5de5\u5177\u3002<span class=\"application\">vacuumdb</span> \u8fd8\u4f1a\u751f\u6210\u4f9b <span class=\"productname\">PostgreSQL</span> \u67e5\u8be2\u4f18\u5316\u5668\u4f7f\u7528\u7684\u5185\u90e8\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u662f SQL \u547d\u4ee4 <a class=\"link\" href=\"/docs/18/sql-vacuum.html\" title=\"VACUUM\"><code class=\"command\">VACUUM</code></a> \u7684\u5305\u88c5\u5668\u3002\u901a\u8fc7\u8be5\u5de5\u5177\u6216\u901a\u8fc7\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u5176\u4ed6\u65b9\u5f0f\u6765\u6e05\u7406\u548c\u5206\u6790\u6570\u636e\u5e93\uff0c\u5728\u6548\u679c\u4e0a\u6ca1\u6709\u533a\u522b\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.6\">\n<h2 lang=\"zh\">\u9009\u9879</h2>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u63a5\u53d7\u4e0b\u5217\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-a</code><br/></span><span class=\"term\"><code class=\"option\">--all</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6e05\u7406\u6240\u6709\u6570\u636e\u5e93\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--buffer-usage-limit <em class=\"replaceable\"><code>size</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e3a\u4e00\u6b21\u7ed9\u5b9a\u7684 <span class=\"application\">vacuumdb</span> \u8c03\u7528\u6307\u5b9a<a class=\"glossterm\" href=\"/docs/18/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\"></a><a class=\"glossterm\" href=\"/docs/18/glossary.html#GLOSSARY-BUFFER-ACCESS-STRATEGY\" title=\"\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\">\u7f13\u51b2\u533a\u8bbf\u95ee\u7b56\u7565\uff08Buffer Access Strategy\uff09</a>\u73af\u5f62\u7f13\u51b2\u533a\u5927\u5c0f\u3002\u8fd9\u4e2a\u5927\u5c0f\u7528\u4e8e\u8ba1\u7b97\u5c06\u4f5c\u4e3a\u8be5\u7b56\u7565\u4e00\u90e8\u5206\u88ab\u91cd\u7528\u7684\u5171\u4eab\u7f13\u51b2\u533a\u6570\u91cf\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/18/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">[<span class=\"optional\">-d</span>] <em class=\"replaceable\"><code>dbname</code></em></code><br/></span><span class=\"term\"><code class=\"option\">[<span class=\"optional\">--dbname=</span>]<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u672a\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u6307\u5b9a\u8981\u6e05\u7406\u6216\u5206\u6790\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4ece\u73af\u5883\u53d8\u91cf <code class=\"envar\">PGDATABASE</code> \u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u540d\u3002\u5982\u679c\u8be5\u53d8\u91cf\u672a\u8bbe\u7f6e\uff0c\u5219\u4f7f\u7528\u8fde\u63a5\u65f6\u6307\u5b9a\u7684\u7528\u6237\u540d\u3002<em class=\"replaceable\"><code>dbname</code></em> \u53ef\u4ee5\u662f<a class=\"link\" href=\"/docs/18/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--disable-page-skipping</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7981\u6b62\u57fa\u4e8e\u53ef\u89c1\u6027\u6620\u5c04\u5185\u5bb9\u8df3\u8fc7\u9875\u9762\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-e</code><br/></span><span class=\"term\"><code class=\"option\">--echo</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u56de\u663e <span class=\"application\">vacuumdb</span> \u751f\u6210\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u547d\u4ee4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-f</code><br/></span><span class=\"term\"><code class=\"option\">--full</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6267\u884c<span class=\"quote\">\u201c<span class=\"quote\">\u5b8c\u5168</span>\u201d</span>\u6e05\u7406\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-F</code><br/></span><span class=\"term\"><code class=\"option\">--freeze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6fc0\u8fdb\u5730<span class=\"quote\">\u201c<span class=\"quote\">\u51bb\u7ed3</span>\u201d</span>\u5143\u7ec4\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--force-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u59cb\u7ec8\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-j <em class=\"replaceable\"><code>njobs</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--jobs=<em class=\"replaceable\"><code>njobs</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u901a\u8fc7\u540c\u65f6\u8fd0\u884c <em class=\"replaceable\"><code>njobs</code></em> \u6761\u547d\u4ee4\uff0c\u5e76\u884c\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u8be5\u9009\u9879\u53ef\u80fd\u4f1a\u7f29\u77ed\u5904\u7406\u65f6\u95f4\uff0c\u4f46\u4e5f\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u670d\u52a1\u5668\u4e0a\u7684\u8d1f\u8f7d\u3002</p>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u5c06\u6253\u5f00 <em class=\"replaceable\"><code>njobs</code></em> \u4e2a\u5230\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u56e0\u6b64\u8bf7\u786e\u4fdd<a class=\"xref\" href=\"/docs/18/runtime-config-connection.html#GUC-MAX-CONNECTIONS\">max_connections</a>\u7684\u8bbe\u7f6e\u8db3\u591f\u9ad8\uff0c\u80fd\u591f\u5bb9\u7eb3\u6240\u6709\u8fd9\u4e9b\u8fde\u63a5\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c\u5982\u679c\u5c06\u6b64\u6a21\u5f0f\u4e0e <code class=\"option\">-f</code>\uff08<code class=\"literal\">FULL</code>\uff09\u9009\u9879\u4e00\u8d77\u4f7f\u7528\uff0c\u67d0\u4e9b\u7cfb\u7edf\u76ee\u5f55\u88ab\u5e76\u884c\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u56e0\u6b7b\u9501\u800c\u5931\u8d25\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-mxid-age <em class=\"replaceable\"><code>mxid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u591a\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>mxid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u591a\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/18/routine-vacuuming.html#VACUUM-FOR-MULTIXACT-WRAPAROUND\" title=\"24.1.5.1.\u00a0\u591a\u4e8b\u52a1\u4e0e\u56de\u5377\">\u7b2c\u00a024.1.5.1\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u591a\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--min-xid-age <em class=\"replaceable\"><code>xid_age</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5bf9\u4e8b\u52a1 ID \u5e74\u9f84\u81f3\u5c11\u4e3a <em class=\"replaceable\"><code>xid_age</code></em> \u7684\u8868\u6267\u884c\u6e05\u7406\u6216\u5206\u6790\u547d\u4ee4\u3002\u6b64\u8bbe\u7f6e\u53ef\u7528\u4e8e\u4f18\u5148\u5904\u7406\u8868\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\uff08\u89c1<a class=\"xref\" href=\"/docs/18/routine-vacuuming.html#VACUUM-FOR-WRAPAROUND\" title=\"24.1.5.\u00a0\u9632\u6b62\u4e8b\u52a1 ID \u56de\u5377\u5931\u8d25\">\u7b2c\u00a024.1.5\u00a0\u8282</a>\uff09\u3002</p>\n<p lang=\"zh\">\u5c31\u6b64\u9009\u9879\u800c\u8a00\uff0c\u4e00\u4e2a\u5173\u7cfb\u7684\u4e8b\u52a1 ID \u5e74\u9f84\uff0c\u662f\u5176\u4e3b\u5173\u7cfb\u53ca\u5176\u5173\u8054\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff08\u5982\u679c\u5b58\u5728\uff09\u5e74\u9f84\u4e2d\u7684\u8f83\u5927\u8005\u3002\u7531\u4e8e <span class=\"application\">vacuumdb</span> \u53d1\u51fa\u7684\u547d\u4ee4\u5728\u5fc5\u8981\u65f6\u4e5f\u4f1a\u5904\u7406\u8be5\u5173\u7cfb\u7684 <acronym class=\"acronym\">TOAST</acronym> \u8868\uff0c\u56e0\u6b64\u65e0\u9700\u5355\u72ec\u8003\u8651\u5b83\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--missing-stats-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u5206\u6790\u90a3\u4e9b\u5728\u5217\u3001\u7d22\u5f15\u8868\u8fbe\u5f0f\u6216\u6269\u5c55\u7edf\u8ba1\u4fe1\u606f\u5bf9\u8c61\u4e0a\u7f3a\u5c11\u7edf\u8ba1\u4fe1\u606f\u7684\u5173\u7cfb\u3002\u4e0e <code class=\"option\">--analyze-in-stages</code> \u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u6b64\u9009\u9879\u53ef\u9632\u6b62 <span class=\"application\">vacuumdb</span> \u4e34\u65f6\u7528\u6309\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\u751f\u6210\u7684\u7edf\u8ba1\u4fe1\u606f\u66ff\u6362\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u4ece\u800c\u907f\u514d\u67e5\u8be2\u4f18\u5316\u5668\u77ed\u6682\u5730\u4f5c\u51fa\u66f4\u5dee\u7684\u9009\u62e9\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u53ea\u80fd\u4e0e <code class=\"option\">--analyze-only</code> \u6216 <code class=\"option\">--analyze-in-stages</code> \u914d\u5408\u4f7f\u7528\u3002</p>\n<p lang=\"zh\">\u6ce8\u610f\uff0c<code class=\"option\">--missing-stats-only</code> \u8981\u6c42\u62e5\u6709 <code class=\"literal\">SELECT</code> \u6743\u9650\uff0c\u4ee5\u8bbf\u95ee <a class=\"link\" href=\"/docs/18/catalog-pg-statistic.html\" title=\"52.51.\u00a0pg_statistic\"><code class=\"structname\">pg_statistic</code></a> \u548c <a class=\"link\" href=\"/docs/18/catalog-pg-statistic-ext-data.html\" title=\"52.53.\u00a0pg_statistic_ext_data\"><code class=\"structname\">pg_statistic_ext_data</code></a>\uff0c\u800c\u8fd9\u4e9b\u6743\u9650\u9ed8\u8ba4\u53ea\u6388\u4e88\u8d85\u7ea7\u7528\u6237\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-n <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u6240\u6709\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-n</code> \u6765\u6e05\u7406\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-N <em class=\"replaceable\"><code>schema</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--exclude-schema=<em class=\"replaceable\"><code>schema</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>schema</code></em> \u4e2d\u7684\u4efb\u4f55\u8868\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-N</code> \u6765\u6392\u9664\u591a\u4e2a\u6a21\u5f0f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-index-cleanup</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u5220\u9664\u6307\u5411\u6b7b\u5143\u7ec4\u7684\u7d22\u5f15\u6761\u76ee\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-main</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u4e3b\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-process-toast</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5982\u679c\u6709\uff0c\u8df3\u8fc7\u4e0e\u5f85\u6e05\u7406\u8868\u5173\u8054\u7684 TOAST \u8868\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--no-truncate</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u622a\u65ad\u8868\u672b\u5c3e\u7684\u7a7a\u9875\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-P <em class=\"replaceable\"><code>parallel_workers</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--parallel=<em class=\"replaceable\"><code>parallel_workers</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a<em class=\"firstterm\">\u5e76\u884c\u6e05\u7406</em>\u7684\u5e76\u884c\u5de5\u4f5c\u8fdb\u7a0b\u6570\u91cf\u3002\u8fd9\u6837\u53ef\u4ee5\u8ba9\u6e05\u7406\u5229\u7528\u591a\u4e2a CPU \u5904\u7406\u7d22\u5f15\u3002\u53c2\u89c1<a class=\"xref\" href=\"/docs/18/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-q</code><br/></span><span class=\"term\"><code class=\"option\">--quiet</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4e0d\u663e\u793a\u8fdb\u5ea6\u6d88\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--skip-locked</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8df3\u8fc7\u90a3\u4e9b\u65e0\u6cd5\u7acb\u5373\u52a0\u9501\u5e76\u8fdb\u884c\u5904\u7406\u7684\u5173\u7cfb\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-t <em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code><br/></span><span class=\"term\"><code class=\"option\">--table=<em class=\"replaceable\"><code>table</code></em> [ (<em class=\"replaceable\"><code>column</code></em> [,...]) ]</code></span></dt>\n<dd>\n<p lang=\"zh\">\u4ec5\u6e05\u7406\u6216\u5206\u6790 <em class=\"replaceable\"><code>table</code></em>\u3002\u53ea\u6709\u4e0e <code class=\"option\">--analyze</code> \u6216 <code class=\"option\">--analyze-only</code> \u9009\u9879\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u624d\u80fd\u6307\u5b9a\u5217\u540d\u3002\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6307\u5b9a <code class=\"option\">-t</code> \u6765\u6e05\u7406\u591a\u4e2a\u8868\u3002</p>\n<div class=\"tip\">\n<h3 class=\"title\" lang=\"zh\">\u63d0\u793a</h3>\n<p lang=\"zh\">\u5982\u679c\u6307\u5b9a\u4e86\u5217\uff0c\u4f60\u5f88\u53ef\u80fd\u9700\u8981\u5728 shell \u4e2d\u8f6c\u4e49\u62ec\u53f7\u3002\uff08\u89c1\u4e0b\u9762\u7684\u793a\u4f8b\u3002\uff09</p>\n</div>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-v</code><br/></span><span class=\"term\"><code class=\"option\">--verbose</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-V</code><br/></span><span class=\"term\"><code class=\"option\">--version</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8f93\u51fa <span class=\"application\">vacuumdb</span> \u7684\u7248\u672c\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u540c\u65f6\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-Z</code><br/></span><span class=\"term\"><code class=\"option\">--analyze-only</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--analyze-in-stages</code></span></dt>\n<dd>\n<p lang=\"zh\">\u7c7b\u4f3c <code class=\"option\">--analyze-only</code>\uff0c\u4ec5\u8ba1\u7b97\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\u7684\u7edf\u8ba1\u4fe1\u606f\uff08\u4e0d\u6267\u884c\u6e05\u7406\uff09\u3002\u8be5\u9009\u9879\u4f1a\u8fd0\u884c\u4e09\u4e2a\u9636\u6bb5\u7684\u5206\u6790\uff1b\u7b2c\u4e00\u9636\u6bb5\u4f7f\u7528\u5c3d\u53ef\u80fd\u4f4e\u7684\u7edf\u8ba1\u76ee\u6807\uff08\u89c1<a class=\"xref\" href=\"/docs/18/runtime-config-query.html#GUC-DEFAULT-STATISTICS-TARGET\">default_statistics_target</a>\uff09\uff0c\u4ee5\u4fbf\u66f4\u5feb\u5730\u751f\u6210\u53ef\u7528\u7edf\u8ba1\u4fe1\u606f\uff0c\u968f\u540e\u7684\u9636\u6bb5\u518d\u6784\u5efa\u5b8c\u6574\u7edf\u8ba1\u4fe1\u606f\u3002</p>\n<p lang=\"zh\">\u6b64\u9009\u9879\u4ec5\u5728\u5206\u6790\u5f53\u524d\u6ca1\u6709\u7edf\u8ba1\u4fe1\u606f\uff0c\u6216\u73b0\u6709\u7edf\u8ba1\u4fe1\u606f\u5b8c\u5168\u9519\u8bef\u7684\u6570\u636e\u5e93\u65f6\u624d\u6709\u7528\uff0c\u4f8b\u5982\u6570\u636e\u5e93\u521a\u901a\u8fc7\u6062\u590d\u8f6c\u50a8\u91cd\u65b0\u586b\u5145\uff0c\u6216\u521a\u901a\u8fc7 <code class=\"command\">pg_upgrade</code> \u5347\u7ea7\u5f97\u5230\u3002\u6ce8\u610f\uff0c\u5728\u5df2\u6709\u7edf\u8ba1\u4fe1\u606f\u7684\u6570\u636e\u5e93\u4e0a\u4f7f\u7528\u6b64\u9009\u9879\uff0c\u53ef\u80fd\u4f1a\u56e0\u4e3a\u65e9\u671f\u9636\u6bb5\u91c7\u7528\u8f83\u4f4e\u7edf\u8ba1\u76ee\u6807\uff0c\u5bfc\u81f4\u67e5\u8be2\u4f18\u5316\u5668\u7684\u9009\u62e9\u6682\u65f6\u53d8\u5dee\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-?</code><br/></span><span class=\"term\"><code class=\"option\">--help</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u663e\u793a <span class=\"application\">vacuumdb</span> \u547d\u4ee4\u884c\u53c2\u6570\u7684\u5e2e\u52a9\u5e76\u9000\u51fa\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\"><span class=\"application\">vacuumdb</span> \u8fd8\u63a5\u53d7\u4e0b\u5217\u7528\u4e8e\u8fde\u63a5\u53c2\u6570\u7684\u547d\u4ee4\u884c\u53c2\u6570\uff1a</p>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"option\">-h <em class=\"replaceable\"><code>host</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--host=<em class=\"replaceable\"><code>host</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u6240\u5728\u673a\u5668\u7684\u4e3b\u673a\u540d\u3002\u5982\u679c\u8be5\u503c\u4ee5\u659c\u6760\u5f00\u5934\uff0c\u5219\u5b83\u4f1a\u88ab\u7528\u4f5c Unix \u57df\u5957\u63a5\u5b57\u76ee\u5f55\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-p <em class=\"replaceable\"><code>port</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--port=<em class=\"replaceable\"><code>port</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u670d\u52a1\u5668\u76d1\u542c\u8fde\u63a5\u6240\u7528\u7684 TCP \u7aef\u53e3\uff0c\u6216\u672c\u5730 Unix \u57df\u5957\u63a5\u5b57\u6587\u4ef6\u6269\u5c55\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-U <em class=\"replaceable\"><code>username</code></em></code><br/></span><span class=\"term\"><code class=\"option\">--username=<em class=\"replaceable\"><code>username</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u8fde\u63a5\u65f6\u4f7f\u7528\u7684\u7528\u6237\u540d\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-w</code><br/></span><span class=\"term\"><code class=\"option\">--no-password</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u7edd\u4e0d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c\u800c\u53c8\u65e0\u6cd5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u83b7\u5f97\u5bc6\u7801\uff0c\u4f8b\u5982 <code class=\"filename\">.pgpass</code> \u6587\u4ef6\uff0c\u5219\u8fde\u63a5\u5c1d\u8bd5\u5c06\u5931\u8d25\u3002\u6b64\u9009\u9879\u53ef\u7528\u4e8e\u65e0\u4eba\u8f93\u5165\u5bc6\u7801\u7684\u6279\u5904\u7406\u4f5c\u4e1a\u548c\u811a\u672c\u3002</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">-W</code><br/></span><span class=\"term\"><code class=\"option\">--password</code></span></dt>\n<dd>\n<p lang=\"zh\">\u5f3a\u5236 <span class=\"application\">vacuumdb</span> \u5728\u8fde\u63a5\u6570\u636e\u5e93\u4e4b\u524d\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002</p>\n<p lang=\"zh\">\u8fd9\u4e2a\u9009\u9879\u7edd\u975e\u5fc5\u9700\uff0c\u56e0\u4e3a\u5982\u679c\u670d\u52a1\u5668\u8981\u6c42\u5bc6\u7801\u8ba4\u8bc1\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u81ea\u52a8\u63d0\u793a\u8f93\u5165\u5bc6\u7801\u3002\u4e0d\u8fc7\uff0c<span class=\"application\">vacuumdb</span> \u4f1a\u5148\u6d6a\u8d39\u4e00\u6b21\u8fde\u63a5\u5c1d\u8bd5\uff0c\u624d\u5f97\u77e5\u670d\u52a1\u5668\u9700\u8981\u5bc6\u7801\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8f93\u5165 <code class=\"option\">-W</code> \u4ee5\u907f\u514d\u8fd9\u6b21\u989d\u5916\u7684\u8fde\u63a5\u5c1d\u8bd5\u662f\u503c\u5f97\u7684\u3002</p>\n</dd>\n<dt><span class=\"term\"><code class=\"option\">--maintenance-db=<em class=\"replaceable\"><code>dbname</code></em></code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u5f53\u4f7f\u7528 <code class=\"option\">-a</code>/<code class=\"option\">--all</code> \u65f6\uff0c\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u4ee5\u6536\u96c6\u8981\u6e05\u7406\u7684\u6570\u636e\u5e93\u5217\u8868\u3002\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">postgres</code> \u6570\u636e\u5e93\uff1b\u82e5\u8be5\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4f7f\u7528 <code class=\"literal\">template1</code>\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u4e2a<a class=\"link\" href=\"/docs/18/libpq-connect.html#LIBPQ-CONNSTRING\" title=\"32.1.1.\u00a0\u8fde\u63a5\u5b57\u7b26\u4e32\">\u8fde\u63a5\u5b57\u7b26\u4e32</a>\u3002\u5982\u679c\u662f\u8fd9\u6837\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u53c2\u6570\u5c06\u8986\u76d6\u4efb\u4f55\u51b2\u7a81\u7684\u547d\u4ee4\u884c\u9009\u9879\u3002\u6b64\u5916\uff0c\u9664\u6570\u636e\u5e93\u540d\u672c\u8eab\u5916\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u7684\u5176\u4ed6\u53c2\u6570\u5728\u8fde\u63a5\u5230\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u4e5f\u4f1a\u88ab\u590d\u7528\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.7\">\n<h2 lang=\"zh\">\u73af\u5883</h2>\n<div class=\"variablelist\">\n<dl class=\"variablelist\">\n<dt><span class=\"term\"><code class=\"envar\">PGDATABASE</code><br/></span><span class=\"term\"><code class=\"envar\">PGHOST</code><br/></span><span class=\"term\"><code class=\"envar\">PGPORT</code><br/></span><span class=\"term\"><code class=\"envar\">PGUSER</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570</p>\n</p>\n</dd>\n<dt><span class=\"term\"><code class=\"envar\">PG_COLOR</code></span></dt>\n<dd>\n<p lang=\"zh\">\n<p>\u6307\u5b9a\u8bca\u65ad\u6d88\u606f\u662f\u5426\u4f7f\u7528\u989c\u8272\u3002\u53ef\u9009\u503c\u4e3a <code class=\"literal\">always</code>\u3001<code class=\"literal\">auto</code>\u548c <code class=\"literal\">never</code>\u3002</p>\n</p>\n</dd>\n</dl>\n</div>\n<p lang=\"zh\">\u4e0e\u5927\u591a\u6570\u5176\u4ed6 <span class=\"productname\">PostgreSQL</span> \u5de5\u5177\u4e00\u6837\uff0c\u6b64\u5de5\u5177\u4e5f\u4f7f\u7528 <span class=\"application\">libpq</span> \u652f\u6301\u7684\u73af\u5883\u53d8\u91cf\uff08\u89c1<a class=\"xref\" href=\"/docs/18/libpq-envars.html\" title=\"32.15.\u00a0\u73af\u5883\u53d8\u91cf\">\u7b2c\u00a032.15\u00a0\u8282</a>\uff09\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.8\">\n<h2 lang=\"zh\">\u8bca\u65ad</h2>\n<p lang=\"zh\">\u5982\u679c\u9047\u5230\u95ee\u9898\uff0c\u8bf7\u53c2\u89c1<a class=\"xref\" href=\"/docs/18/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a>\u548c<a class=\"xref\" href=\"/docs/18/app-psql.html\" title=\"psql\"><span class=\"refentrytitle\"><span class=\"application\">psql</span></span></a>\u4e2d\u5173\u4e8e\u6f5c\u5728\u95ee\u9898\u548c\u9519\u8bef\u6d88\u606f\u7684\u8ba8\u8bba\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u5fc5\u987b\u5728\u76ee\u6807\u4e3b\u673a\u4e0a\u8fd0\u884c\u3002\u6b64\u5916\uff0c<span class=\"application\">libpq</span>\u524d\u7aef\u5e93\u6240\u4f7f\u7528\u7684\u4efb\u4f55\u9ed8\u8ba4\u8fde\u63a5\u8bbe\u7f6e\u548c\u73af\u5883\u53d8\u91cf\u90fd\u4f1a\u751f\u6548\u3002</p>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.9\">\n<h2 lang=\"zh\">\u793a\u4f8b</h2>\n<p lang=\"zh\">\u6e05\u7406\u6570\u636e\u5e93 <code class=\"literal\">test</code>\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb test</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u5e76\u5206\u6790\u540d\u4e3a <code class=\"literal\">bigdb</code> \u7684\u6570\u636e\u5e93\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze bigdb</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d\u7684\u5355\u4e2a\u8868 foo\uff0c\u5e76\u5206\u6790\u8be5\u8868\u7684\u5355\u5217 bar\uff0c\u4ee5\u4f9b\u4f18\u5316\u5668\u4f7f\u7528\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --analyze --verbose --table='foo(bar)' xyzzy</code></strong>\n</pre>\n<p lang=\"zh\">\u6e05\u7406\u540d\u4e3a xyzzy \u7684\u6570\u636e\u5e93\u4e2d foo \u548c bar \u6a21\u5f0f\u5185\u7684\u6240\u6709\u8868\uff1a</p>\n<pre class=\"screen\"><code class=\"prompt\">$ </code><strong class=\"userinput\"><code>vacuumdb --schema='foo' --schema='bar' xyzzy</code></strong>\n</pre>\n</div>\n<div class=\"refsect1\" id=\"id-1.9.4.23.10\">\n<h2 lang=\"zh\">\u53e6\u89c1</h2><span class=\"simplelist\"><a class=\"xref\" href=\"https://pg.center/docs/18/sql-vacuum.html\" title=\"VACUUM\"><span class=\"refentrytitle\">VACUUM</span></a></span>\n</div>\n</div></div>", "manual_path": "app-vacuumdb.html", "localization": {"status": "complete", "sources": [{"url": "/docs/18/app-vacuumdb.html", "method": "same-major semantic node", "sha256": "78ed078fc5c42065c077704220de349c29e128410224abeceb277bc63c2531c1", "language": "zh", "matched_nodes": ["#APP-VACUUMDB/div[2]/p[1]", "#APP-VACUUMDB/div[3]/h2[0]", "#APP-VACUUMDB/div[4]/p[1]", "#APP-VACUUMDB/div[4]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[13]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[15]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[17]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[19]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[21]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[23]/p[2]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[25]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[27]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[29]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[31]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[33]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[35]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[37]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[39]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[41]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]/div[1]/h3[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]/div[1]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[43]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[45]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[47]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[49]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[51]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[53]/p[0]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[53]/p[1]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[55]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[2]/dl[0]/dd[9]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[11]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[1]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[3]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[5]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[7]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[0]", "#APP-VACUUMDB/div[5]/div[4]/dl[0]/dd[9]/p[1]", "#APP-VACUUMDB/div[5]/p[1]", "#APP-VACUUMDB/div[5]/p[3]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[1]", "#APP-VACUUMDB/div[6]/div[1]/dl[0]/dd[3]", "#APP-VACUUMDB/div[6]/h2[0]", "#APP-VACUUMDB/div[6]/p[2]", "#APP-VACUUMDB/div[7]/h2[0]", "#APP-VACUUMDB/div[7]/p[1]", "#APP-VACUUMDB/div[8]/h2[0]", "#APP-VACUUMDB/div[8]/p[1]", "#APP-VACUUMDB/div[8]/p[3]", "#APP-VACUUMDB/div[9]/h2[0]"]}], "language": "zh", "original_text": {"/versions/18/description/0": "vacuumdb \u2014 garbage-collect and analyze a PostgreSQL database", "/versions/18/facts/0/label": "Documented executable", "/versions/18/facts/1/label": "Executable version", "/versions/18/facts/2/label": "Reference inventory", "/versions/18/facts/2/value": "Client applications", "/versions/18/facts/3/label": "Option definition groups", "/versions/18/tables/0/title": "Documented options", "/versions/18/tables/1/title": "Environment variables", "/versions/18/tables/0/rows/0/summary": "Vacuum all databases.", "/versions/18/tables/0/rows/1/summary": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM .", "/versions/18/tables/0/rows/2/summary": "Disable skipping pages based on the contents of the visibility map.", "/versions/18/tables/0/rows/3/summary": "Echo the commands that vacuumdb generates and sends to the server.", "/versions/18/tables/0/rows/4/summary": "Perform \u201c full \u201d vacuuming.", "/versions/18/tables/0/rows/5/summary": "Aggressively \u201c freeze \u201d tuples.", "/versions/18/tables/0/rows/6/summary": "Always remove index entries pointing to dead tuples.", "/versions/18/tables/0/rows/7/summary": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server.", "/versions/18/tables/0/rows/8/summary": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ).", "/versions/18/tables/0/rows/9/summary": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ).", "/versions/18/tables/0/columns/0/label": "Option and arguments", "/versions/18/tables/0/columns/1/label": "Description", "/versions/18/tables/0/rows/10/summary": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices.", "/versions/18/tables/0/rows/11/summary": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches.", "/versions/18/tables/0/rows/12/summary": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches.", "/versions/18/tables/0/rows/13/summary": "Do not remove index entries pointing to dead tuples.", "/versions/18/tables/0/rows/14/summary": "Skip the main relation.", "/versions/18/tables/0/rows/15/summary": "Skip the TOAST table associated with the table to vacuum, if any.", "/versions/18/tables/0/rows/16/summary": "Do not truncate empty pages at the end of the table.", "/versions/18/tables/0/rows/17/summary": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM .", "/versions/18/tables/0/rows/18/summary": "Do not display progress messages.", "/versions/18/tables/0/rows/19/summary": "Skip relations that cannot be immediately locked for processing.", "/versions/18/tables/0/rows/20/summary": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches.", "/versions/18/tables/0/rows/21/summary": "Print detailed information during processing.", "/versions/18/tables/0/rows/22/summary": "Print the vacuumdb version and exit.", "/versions/18/tables/0/rows/23/summary": "Also calculate statistics for use by the optimizer.", "/versions/18/tables/0/rows/24/summary": "Only calculate statistics for use by the optimizer (no vacuum).", "/versions/18/tables/0/rows/25/summary": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics.", "/versions/18/tables/0/rows/26/summary": "Show help about vacuumdb command line arguments, and exit.", "/versions/18/tables/0/rows/27/summary": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.", "/versions/18/tables/0/rows/28/summary": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.", "/versions/18/tables/0/rows/29/summary": "User name to connect as.", "/versions/18/tables/0/rows/30/summary": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.", "/versions/18/tables/0/rows/31/summary": "Force vacuumdb to prompt for a password before connecting to a database.", "/versions/18/tables/0/rows/32/summary": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases.", "/versions/18/tables/1/columns/0/label": "Variable", "/versions/18/tables/1/columns/1/label": "Meaning", "/versions/18/tables/1/rows/0/description": "Default connection parameters", "/versions/18/tables/1/rows/1/description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "f2088b1e29c02459b6d0e02c2523d85e5b8075090ba51bdfc2d79bc76b9dc224"}, "comparison_data": {"options": [{"names": ["-a", "--all"], "signature": "-a --all", "description": "Vacuum all databases."}, {"names": ["--buffer-usage-limit size"], "signature": "--buffer-usage-limit size", "description": "Specifies the Buffer Access Strategy ring buffer size for a given invocation of vacuumdb . This size is used to calculate the number of shared buffers which will be reused as part of this strategy. See VACUUM ."}, {"names": ["--disable-page-skipping"], "signature": "--disable-page-skipping", "description": "Disable skipping pages based on the contents of the visibility map."}, {"names": ["-e", "--echo"], "signature": "-e --echo", "description": "Echo the commands that vacuumdb generates and sends to the server."}, {"names": ["-f", "--full"], "signature": "-f --full", "description": "Perform \u201c full \u201d vacuuming."}, {"names": ["-F", "--freeze"], "signature": "-F --freeze", "description": "Aggressively \u201c freeze \u201d tuples."}, {"names": ["--force-index-cleanup"], "signature": "--force-index-cleanup", "description": "Always remove index entries pointing to dead tuples."}, {"names": ["-j njobs", "--jobs= njobs"], "signature": "-j njobs --jobs= njobs", "description": "Execute the vacuum or analyze commands in parallel by running njobs commands simultaneously. This option may reduce the processing time but it also increases the load on the database server. vacuumdb will open njobs connections to the database, so make sure your max_connections setting is high enough to accommodate all connections. Note that using this mode together with the -f ( FULL ) option might cause deadlock failures if certain system catalogs are processed in parallel."}, {"names": ["--min-mxid-age mxid_age"], "signature": "--min-mxid-age mxid_age", "description": "Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--min-xid-age xid_age"], "signature": "--min-xid-age xid_age", "description": "Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately."}, {"names": ["--missing-stats-only"], "signature": "--missing-stats-only", "description": "Only analyze relations that are missing statistics for a column, index expression, or extended statistics object. When used with --analyze-in-stages , this option prevents vacuumdb from temporarily replacing existing statistics with ones generated with lower statistics targets, thus avoiding transiently worse query optimizer choices. This option can only be used in conjunction with --analyze-only or --analyze-in-stages . Note that --missing-stats-only requires SELECT privileges on pg_statistic and pg_statistic_ext_data , which are restricted to superusers by default."}, {"names": ["-n schema", "--schema= schema"], "signature": "-n schema --schema= schema", "description": "Clean or analyze all tables in schema only. Multiple schemas can be vacuumed by writing multiple -n switches."}, {"names": ["-N schema", "--exclude-schema= schema"], "signature": "-N schema --exclude-schema= schema", "description": "Do not clean or analyze any tables in schema . Multiple schemas can be excluded by writing multiple -N switches."}, {"names": ["--no-index-cleanup"], "signature": "--no-index-cleanup", "description": "Do not remove index entries pointing to dead tuples."}, {"names": ["--no-process-main"], "signature": "--no-process-main", "description": "Skip the main relation."}, {"names": ["--no-process-toast"], "signature": "--no-process-toast", "description": "Skip the TOAST table associated with the table to vacuum, if any."}, {"names": ["--no-truncate"], "signature": "--no-truncate", "description": "Do not truncate empty pages at the end of the table."}, {"names": ["-P parallel_workers", "--parallel= parallel_workers"], "signature": "-P parallel_workers --parallel= parallel_workers", "description": "Specify the number of parallel workers for parallel vacuum . This allows the vacuum to leverage multiple CPUs to process indexes. See VACUUM ."}, {"names": ["-q", "--quiet"], "signature": "-q --quiet", "description": "Do not display progress messages."}, {"names": ["--skip-locked"], "signature": "--skip-locked", "description": "Skip relations that cannot be immediately locked for processing."}, {"names": ["-t table [ ( column [,...]) ]", "--table= table [ ( column [,...]) ]"], "signature": "-t table [ ( column [,...]) ] --table= table [ ( column [,...]) ]", "description": "Clean or analyze table only. Column names can be specified only in conjunction with the --analyze or --analyze-only options. Multiple tables can be vacuumed by writing multiple -t switches. Tip If you specify columns, you probably have to escape the parentheses from the shell. (See examples below.)"}, {"names": ["-v", "--verbose"], "signature": "-v --verbose", "description": "Print detailed information during processing."}, {"names": ["-V", "--version"], "signature": "-V --version", "description": "Print the vacuumdb version and exit."}, {"names": ["-z", "--analyze"], "signature": "-z --analyze", "description": "Also calculate statistics for use by the optimizer."}, {"names": ["-Z", "--analyze-only"], "signature": "-Z --analyze-only", "description": "Only calculate statistics for use by the optimizer (no vacuum)."}, {"names": ["--analyze-in-stages"], "signature": "--analyze-in-stages", "description": "Only calculate statistics for use by the optimizer (no vacuum), like --analyze-only . Run three stages of analyze; the first stage uses the lowest possible statistics target (see default_statistics_target ) to produce usable statistics faster, and subsequent stages build the full statistics. This option is only useful to analyze a database that currently has no statistics or has wholly incorrect ones, such as if it is newly populated from a restored dump or by pg_upgrade . Be aware that running with this option in a database with existing statistics may cause the query optimizer choices to become transiently worse due to the low statistics targets of the early stages."}, {"names": ["-?", "--help"], "signature": "-? --help", "description": "Show help about vacuumdb command line arguments, and exit."}, {"names": ["-h host", "--host= host"], "signature": "-h host --host= host", "description": "Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket."}, {"names": ["-p port", "--port= port"], "signature": "-p port --port= port", "description": "Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections."}, {"names": ["-U username", "--username= username"], "signature": "-U username --username= username", "description": "User name to connect as."}, {"names": ["-w", "--no-password"], "signature": "-w --no-password", "description": "Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password."}, {"names": ["-W", "--password"], "signature": "-W --password", "description": "Force vacuumdb to prompt for a password before connecting to a database. This option is never essential, since vacuumdb will automatically prompt for a password if the server demands password authentication. However, vacuumdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to avoid the extra connection attempt."}, {"names": ["--maintenance-db= dbname"], "signature": "--maintenance-db= dbname", "description": "When the -a / --all is used, connect to this database to gather the list of databases to vacuum. If not specified, the postgres database will be used, or if that does not exist, template1 will be used. This can be a connection string . If so, connection string parameters will override any conflicting command line options. Also, connection string parameters other than the database name itself will be re-used when connecting to other databases."}], "synopsis": ["vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]", "vacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]"], "environment": [{"name": "PGDATABASE PGHOST PGPORT PGUSER", "description": "Default connection parameters"}, {"name": "PG_COLOR", "description": "Specifies whether to use color in diagnostic messages. Possible values are always , auto and never ."}]}, "comparison_hash": "c475ca852806a0a70db22a56bbad2d270080a07ee8d55cb7db8335b2d58e171a", "manual_language": "zh"}, "comparison": {"left": "16", "right": "17", "status": "changed", "diff": "--- PostgreSQL 16\n+++ PostgreSQL 17\n@@ -72,14 +72,14 @@\n       \"signature\": \"-j njobs --jobs= njobs\"\n     },\n     {\n-      \"description\": \"Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 25.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately.\",\n+      \"description\": \"Only execute the vacuum or analyze commands on tables with a multixact ID age of at least mxid_age . This setting is useful for prioritizing tables to process to prevent multixact ID wraparound (see Section 24.1.5.1 ). For the purposes of this option, the multixact ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately.\",\n       \"names\": [\n         \"--min-mxid-age mxid_age\"\n       ],\n       \"signature\": \"--min-mxid-age mxid_age\"\n     },\n     {\n-      \"description\": \"Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 25.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately.\",\n+      \"description\": \"Only execute the vacuum or analyze commands on tables with a transaction ID age of at least xid_age . This setting is useful for prioritizing tables to process to prevent transaction ID wraparound (see Section 24.1.5 ). For the purposes of this option, the transaction ID age of a relation is the greatest of the ages of the main relation and its associated TOAST table, if one exists. Since the commands issued by vacuumdb will also process the TOAST table for the relation if necessary, it does not need to be considered separately.\",\n       \"names\": [\n         \"--min-xid-age xid_age\"\n       ],\n@@ -256,8 +256,8 @@\n     }\n   ],\n   \"synopsis\": [\n-    \"vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname ]\",\n-    \"vacuumdb [ connection-option ...] [ option ...] [ [ -n | --schema schema ] | [ -N | --exclude-schema schema ] ] ... [ dbname ]\",\n-    \"vacuumdb [ connection-option ...] [ option ...] -a | --all\"\n+    \"vacuumdb [ connection-option ...] [ option ...] [ -t | --table table [( column [,...] )] ] ... [ dbname | -a | --all ]\",\n+    \"vacuumdb [ connection-option ...] [ option ...] [ -n | --schema schema ] ... [ dbname | -a | --all ]\",\n+    \"vacuumdb [ connection-option ...] [ option ...] [ -N | --exclude-schema schema ] ... [ dbname | -a | --all ]\"\n   ]\n }"}}