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keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/10/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "version": "10", "link_map": {"/zh/docs/10/libpq.html#LIBPQ-KEEPALIVES-INTERVAL": "/docs/10/libpq.html#LIBPQ-KEEPALIVES-INTERVAL"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/10/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "27f16c464f3e01e4b97221eb128b08983ee1914bedadb7c905cef037fcd0bef0", "content_hash": "b67216c7b797862d9d8e6365aacde56f3712da6618b0eea0a8ea7f6492525aed", "source_database": "center", "source_revision": "f9301feba91e2e2566038a36b8cee0e4402db68989538f88670fddd20b1f78ea"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "description": ["\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002"], "environment": [], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "localization": {"status": "complete", "sources": [{"url": "/docs/10/libpq-envars.html", "method": "same-major semantic node", "sha256": "56efca8d413009f717bd99f94ab808040a7eb49606882cc85485bbfec4619f1a", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/10/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "6b8334d15f0f994e6ff4d5737cd83a42dd99bb9df772cc68e9a52f4334fcdbdf", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/10/description/0": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "/versions/10/facts/0/label": "Client library", "/versions/10/facts/1/label": "Manual definition", "/versions/10/facts/1/value": "Documented", "/versions/10/facts/2/label": "Source environment fallback", "/versions/10/facts/2/value": "None declared in the option table", "/versions/10/facts/3/label": "Compiled fallback expression", "/versions/10/related/0/label": "Connection service file", "/versions/10/related/1/label": "Password file", "/versions/10/related/2/label": "All libpq environment variables", "/versions/10/sections/0/title": "Default resolution and service-file precedence", "/versions/10/sections/1/title": "Environment variable evidence", "/versions/10/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/10/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/10/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "1b9839a488368a397906b2e9fd9dbcfacaa108712765db9c78d09600b45fc37a", "canonical_center_text_hash": "b67216c7b797862d9d8e6365aacde56f3712da6618b0eea0a8ea7f6492525aed"}, "source_option": {"keyword": "keepalives_interval", "declaration": "\"keepalives_interval\", NULL, NULL, NULL, \"TCP-Keepalives-Interval\", \"\", 10, offsetof(struct pg_conn, keepalives_interval)", "environment": "", "source_notes": [], "compiled_default_expression": "NULL"}, "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "comparison_data": {"keyword": "keepalives_interval", "definition": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "documented": true, "environment": "", "default_evidence": ["Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect."], "compiled_default_expression": "NULL"}, "comparison_hash": "75920db0eaf6fbffaa1344442a9e9996da9483c0aaa600b42f78bdbfed6d6bb9", "manual_language": "zh", "default_evidence": ["Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. 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These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."]}, "11": {"facts": [{"label": "\u5ba2\u6237\u7aef\u5e93", "value": "libpq 11.22"}, {"label": "\u624b\u518c\u5b9a\u4e49", "value": "\u624b\u518c\u5df2\u8bb0\u8f7d"}, {"label": "\u6e90\u7801\u4e2d\u7684\u73af\u5883\u53d8\u91cf\u56de\u9000", "value": "\u9009\u9879\u8868\u4e2d\u672a\u58f0\u660e"}, {"label": "\u7f16\u8bd1\u65f6\u56de\u9000\u8868\u8fbe\u5f0f", "value": "NULL"}], "tables": [], "keyword": "keepalives_interval", "related": [{"url": "/docs/11/libpq-pgservice.html", "label": "\u8fde\u63a5\u670d\u52a1\u6587\u4ef6"}, {"url": "/docs/11/libpq-pgpass.html", "label": "\u53e3\u4ee4\u6587\u4ef6"}, {"url": "/docs/11/libpq-envars.html", "label": "\u6240\u6709 libpq \u73af\u5883\u53d8\u91cf"}], "release": {"ref": 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\u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/11/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "version": "11", "link_map": {"/zh/docs/11/libpq.html#LIBPQ-KEEPALIVES-INTERVAL": "/docs/11/libpq.html#LIBPQ-KEEPALIVES-INTERVAL"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/11/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "4194f8909ec1943c9cad7040010d25ded7b8e5bc27625c92fc4f2372529273d5", "content_hash": "04e014fb1899f9ce915fe982ad6355fc336485065fb2008a3d893c1fd54bbd69", "source_database": "center", "source_revision": "53315ddaf3b3f9e6669fd1edc096bbb2cd4a65ea3e836c89e542b43af9ba3a7f"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "description": ["\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002"], "environment": [], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "localization": {"status": "complete", "sources": [{"url": "/docs/11/libpq-envars.html", "method": "same-major semantic node", "sha256": "241bdfa477deab32c613f06960089b27077afab17eb7b335b76d77a3bdfa2b43", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/11/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "75b71911d8a339c968c0b84531b4ac1922b3eac509a3aa0f899773ed1ad6d494", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/11/description/0": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "/versions/11/facts/0/label": "Client library", "/versions/11/facts/1/label": "Manual definition", "/versions/11/facts/1/value": "Documented", "/versions/11/facts/2/label": "Source environment fallback", "/versions/11/facts/2/value": "None declared in the option table", "/versions/11/facts/3/label": "Compiled fallback expression", "/versions/11/related/0/label": "Connection service file", "/versions/11/related/1/label": "Password file", "/versions/11/related/2/label": "All libpq environment variables", "/versions/11/sections/0/title": "Default resolution and service-file precedence", "/versions/11/sections/1/title": "Environment variable evidence", "/versions/11/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/11/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/11/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. 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A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "documented": true, "environment": "", "default_evidence": ["Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. 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\u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/12/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "version": "12", "link_map": {"/zh/docs/12/libpq.html#LIBPQ-KEEPALIVES-INTERVAL": "/docs/12/libpq.html#LIBPQ-KEEPALIVES-INTERVAL"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/12/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "57dd512415e4c223743000a3860efc6f18bbc351fed159d6262d2bccf9a76c50", "content_hash": "fb4fe46a479800023a65ac3d7c819e1b16dab51bf9bc4c1c92bb7213780859a3", "source_database": "center", "source_revision": "7a827e97cbfacd7febff75f34443e2043e40723de5b6d8c9d81a9430b65a37e4"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "description": ["\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002"], "environment": [], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "localization": {"status": "complete", "sources": [{"url": "/docs/12/libpq-envars.html", "method": "same-major semantic node", "sha256": "9bba02c535ea735e2ff43bd82abaded83cea478820a503ba3403efd95091d864", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/12/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "7c85a7191f248107e24b48136836ccf7d6b47dfb718db2f8673ea5e19056492b", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/12/description/0": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "/versions/12/facts/0/label": "Client library", "/versions/12/facts/1/label": "Manual definition", "/versions/12/facts/1/value": "Documented", "/versions/12/facts/2/label": "Source environment fallback", "/versions/12/facts/2/value": "None declared in the option table", "/versions/12/facts/3/label": "Compiled fallback expression", "/versions/12/related/0/label": "Connection service file", "/versions/12/related/1/label": "Password file", "/versions/12/related/2/label": "All libpq environment variables", "/versions/12/sections/0/title": "Default resolution and service-file precedence", "/versions/12/sections/1/title": "Environment variable evidence", "/versions/12/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/12/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/12/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. 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\u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/13/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "version": "13", "link_map": {"/zh/docs/13/libpq.html#LIBPQ-KEEPALIVES-INTERVAL": "/docs/13/libpq.html#LIBPQ-KEEPALIVES-INTERVAL"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/13/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "bf9aeacdf93f86434a794680b977c4f59bba76cc644e507b607aeb27244a6f76", "content_hash": "df0c182bfd13c83f72b8cf893661680fd052a7deae9cffc6b28c69076e1580f1", "source_database": "center", "source_revision": "614ee3133270254e476c118cdf6f72af78d4e4b8bbd9b28ed9ab1e14e4e9c0f6"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "description": ["\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002"], "environment": [], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "localization": {"status": "complete", "sources": [{"url": "/docs/13/libpq-envars.html", "method": "same-major semantic node", "sha256": "37579b6a9d7ad440f343971936ecd2c3935b572a9b756ae5dd257c4004f3f008", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/13/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "e9f777dc2f7218013fb5d63e3b2c81acf8a8c2e6fe7c0c7f6dd82f15f9632bf4", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/13/description/0": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "/versions/13/facts/0/label": "Client library", "/versions/13/facts/1/label": "Manual definition", "/versions/13/facts/1/value": "Documented", "/versions/13/facts/2/label": "Source environment fallback", "/versions/13/facts/2/value": "None declared in the option table", "/versions/13/facts/3/label": "Compiled fallback expression", "/versions/13/related/0/label": "Connection service file", "/versions/13/related/1/label": "Password file", "/versions/13/related/2/label": "All libpq environment variables", "/versions/13/sections/0/title": "Default resolution and service-file precedence", "/versions/13/sections/1/title": "Environment variable evidence", "/versions/13/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/13/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/13/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. 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A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "documented": true, "environment": "", "default_evidence": ["Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. 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\u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/14/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "version": "14", "link_map": {"/zh/docs/14/libpq.html#LIBPQ-KEEPALIVES-INTERVAL": "/docs/14/libpq.html#LIBPQ-KEEPALIVES-INTERVAL"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/14/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "3fd317b57395eb4d9c3ee9b992b8dc8d4b0a9eb6cb49d2901c3534c5f10a58ab", "content_hash": "ab191cd2775a3f7b72a572ee3a23ca10296c19e0692ed1b56d34d6a6b8087901", "source_database": "center", "source_revision": "588700d46356d8837c77c7c0a4e71e645fe6535983b8f1830aa8f2e4e41c40ae"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "description": ["\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002"], "environment": [], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "localization": {"status": "complete", "sources": [{"url": "/docs/14/libpq-envars.html", "method": "same-major semantic node", "sha256": "7730429c9ed41dfd04210ac6c4c11ecb7dae5cd8ef5e7f5224e53a02eb8e7219", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/14/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "ca623924f7c1365661a6549a08305bb467cd63207e63c2fff50f51124d070ace", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/14/description/0": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "/versions/14/facts/0/label": "Client library", "/versions/14/facts/1/label": "Manual definition", "/versions/14/facts/1/value": "Documented", "/versions/14/facts/2/label": "Source environment fallback", "/versions/14/facts/2/value": "None declared in the option table", "/versions/14/facts/3/label": "Compiled fallback expression", "/versions/14/related/0/label": "Connection service file", "/versions/14/related/1/label": "Password file", "/versions/14/related/2/label": "All libpq environment variables", "/versions/14/sections/0/title": "Default resolution and service-file precedence", "/versions/14/sections/1/title": "Environment variable evidence", "/versions/14/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/14/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/14/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. 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\u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/15/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "version": "15", "link_map": {"/zh/docs/15/libpq.html#LIBPQ-KEEPALIVES-INTERVAL": "/docs/15/libpq.html#LIBPQ-KEEPALIVES-INTERVAL"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/15/libpq.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "76344d48285c675a7794cc1ca33263f799e40047be95f4d5952daaf92f5cb8b0", "content_hash": "3913ba2d50529c083d412525e0d79c5a134bb62c28e5af02e791a2ee2c433424", "source_database": "center", "source_revision": "6af958c6520151fc7697d56e0616b03fb00522c4568158674d452ae0644ba545"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "description": ["\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002"], "environment": [], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "localization": {"status": "complete", "sources": [{"url": "/docs/15/libpq-envars.html", "method": "same-major semantic node", "sha256": "9cc15a47821a9748b9115ad8cbe122178c733cf61ffd24595efd8a31fe10caea", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/15/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "26185a5568858f5dd3ac13624ca83483003538fdce81ed3d60749cfa52a4f47d", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/15/description/0": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "/versions/15/facts/0/label": "Client library", "/versions/15/facts/1/label": "Manual definition", "/versions/15/facts/1/value": "Documented", "/versions/15/facts/2/label": "Source environment fallback", "/versions/15/facts/2/value": "None declared in the option table", "/versions/15/facts/3/label": "Compiled fallback expression", "/versions/15/related/0/label": "Connection service file", "/versions/15/related/1/label": "Password file", "/versions/15/related/2/label": "All libpq environment variables", "/versions/15/sections/0/title": "Default resolution and service-file precedence", "/versions/15/sections/1/title": "Environment variable evidence", "/versions/15/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/15/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/15/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "ba7c815220521341633fc95319ff7fc7ca087d2bffb84830a62c3c5e7a1582b9", "canonical_center_text_hash": "3913ba2d50529c083d412525e0d79c5a134bb62c28e5af02e791a2ee2c433424"}, "source_option": {"keyword": "keepalives_interval", "declaration": "\"keepalives_interval\", NULL, NULL, NULL, \"TCP-Keepalives-Interval\", \"\", 10, offsetof(struct pg_conn, keepalives_interval)", "environment": "", "source_notes": [], "compiled_default_expression": "NULL"}, "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "comparison_data": {"keyword": "keepalives_interval", "definition": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "documented": true, "environment": "", "default_evidence": ["Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. 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\u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/16/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "version": "16", "link_map": {"/zh/docs/16/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL": "/docs/16/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/16/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "e74b68bfbe8979a472296a436fa24f6e424e7a646ec30f0b3627485fa913829b", "content_hash": "db324ca2dee0d204c615f606c44439abc9303466ee71c621d8e07d676a6b13e3", "source_database": "center", "source_revision": "3c21e58b35318021716440e67bb8bafd392b6a2b965a244d90e9e33c99e0bdef"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "description": ["\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002"], "environment": [], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "localization": {"status": "complete", "sources": [{"url": "/docs/16/libpq-envars.html", "method": "same-major semantic node", "sha256": "841a7b2a5d33a812cca40c163dcc0a97350d036c7a31d73230803a40d5c8e917", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/16/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "6facaad2a42331e2d577d3abc10e1cd4a7af12acb08715071c1996e2caa39239", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/16/description/0": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "/versions/16/facts/0/label": "Client library", "/versions/16/facts/1/label": "Manual definition", "/versions/16/facts/1/value": "Documented", "/versions/16/facts/2/label": "Source environment fallback", "/versions/16/facts/2/value": "None declared in the option table", "/versions/16/facts/3/label": "Compiled fallback expression", "/versions/16/related/0/label": "Connection service file", "/versions/16/related/1/label": "Password file", "/versions/16/related/2/label": "All libpq environment variables", "/versions/16/sections/0/title": "Default resolution and service-file precedence", "/versions/16/sections/1/title": "Environment variable evidence", "/versions/16/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/16/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). 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A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "documented": true, "environment": "", "default_evidence": ["Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect."], "compiled_default_expression": "NULL"}, "comparison_hash": "75920db0eaf6fbffaa1344442a9e9996da9483c0aaa600b42f78bdbfed6d6bb9", "manual_language": "zh", "default_evidence": ["Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. 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\u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/17/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "version": "17", "link_map": {"/zh/docs/17/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL": "/docs/17/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/17/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "f4bb08717c663195ea730b9c508e24c1e5da05c33e830d53c1c695343addef44", "content_hash": "338014ff1be8b2343a7aedb03d77deb2e779db0f6afc8a571241c52f5ee6947f", "source_database": "center", "source_revision": "58419c9b0dd42cb34c8d53695bb025a7e582edf55ccd4c5bcb1c2c7c71a37487"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "description": ["\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002"], "environment": [], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "localization": {"status": "complete", "sources": [{"url": "/docs/17/libpq-envars.html", "method": "same-major semantic node", "sha256": "5f1014f4afd40210bc05e52c10a62fe34fcaf5cc4445cb809ec8cdacb003cf1c", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/17/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "0544512734d86673b69ac05be91d417df85476fe6048c6d4b197c65a7d566bbe", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/17/description/0": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. 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\u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "version": "18", "link_map": {"/zh/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL": "/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "eb8af934ad7b0b89956a742139f5c1e061f4e65b66021349ea248b2f40ca064c", "content_hash": "4e89a3231f023603e703b67216012f89f56c40fbfb37e3766e7270752180f834", "source_database": "center", "source_revision": "ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "description": ["\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002"], "environment": [], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "localization": {"status": "complete", "sources": [{"url": "/docs/18/libpq-envars.html", "method": "same-major semantic node", "sha256": "8423affb67ef7d4f700d7ccc8c0ef66629341568c8d72530a0c765f3d155da2f", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/18/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "a06dfcdffbbdf6bd55987cade2d9ff1db6cbfd9f75eb80c7866e8792cd70463e", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/18/description/0": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "/versions/18/facts/0/label": "Client library", "/versions/18/facts/1/label": "Manual definition", "/versions/18/facts/1/value": "Documented", "/versions/18/facts/2/label": "Source environment fallback", "/versions/18/facts/2/value": "None declared in the option table", "/versions/18/facts/3/label": "Compiled fallback expression", "/versions/18/related/0/label": "Connection service file", "/versions/18/related/1/label": "Password file", "/versions/18/related/2/label": "All libpq environment variables", "/versions/18/sections/0/title": "Default resolution and service-file precedence", "/versions/18/sections/1/title": "Environment variable evidence", "/versions/18/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/18/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/18/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "0ec8a35a67914ce6033758e68c1d89f78fbaa3479faf375ac3fc97d5e9f30161", "canonical_center_text_hash": "4e89a3231f023603e703b67216012f89f56c40fbfb37e3766e7270752180f834"}, "source_option": {"keyword": "keepalives_interval", "declaration": "\"keepalives_interval\", NULL, NULL, NULL, \"TCP-Keepalives-Interval\", \"\", 10, offsetof(struct pg_conn, keepalives_interval)", "environment": "", "source_notes": [], "compiled_default_expression": "NULL"}, "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "comparison_data": {"keyword": "keepalives_interval", "definition": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "documented": true, "environment": "", "default_evidence": ["Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect."], "compiled_default_expression": "NULL"}, "comparison_hash": "75920db0eaf6fbffaa1344442a9e9996da9483c0aaa600b42f78bdbfed6d6bb9", "manual_language": "zh", "default_evidence": ["Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect."], "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "precedence_evidence": ["The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."], "center_zh_rendered": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "19": {"lang": "zh", "facts": [{"label": "\u5ba2\u6237\u7aef\u5e93", "value": "libpq 19rc2"}, {"label": "\u624b\u518c\u5b9a\u4e49", "value": "\u624b\u518c\u5df2\u8bb0\u8f7d"}, {"label": "\u6e90\u7801\u4e2d\u7684\u73af\u5883\u53d8\u91cf\u56de\u9000", "value": "\u9009\u9879\u8868\u4e2d\u672a\u58f0\u660e"}, {"label": "\u7f16\u8bd1\u65f6\u56de\u9000\u8868\u8fbe\u5f0f", "value": "NULL"}], "tables": [], "keyword": "keepalives_interval", "related": [{"url": "/docs/19/libpq-pgservice.html", "label": "\u8fde\u63a5\u670d\u52a1\u6587\u4ef6"}, {"url": "/docs/19/libpq-pgpass.html", "label": "\u53e3\u4ee4\u6587\u4ef6"}, {"url": "/docs/19/libpq-envars.html", "label": "\u6240\u6709 libpq \u73af\u5883\u53d8\u91cf"}], "release": {"ref": 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libpq connection option declarations", "sha256": "8c1ead9bb7a0fbbbc752d1ed9198e99b07c834495e502549309d0765d0bbf041", "archive_sha256": "23a7bb862e4bac395c047305ed0084117b01e71255ce858b907cdcd78ce40351"}, {"url": "/docs/19/libpq-envars.html", "file": "libpq-envars.html", "label": "19rc2 English manual \u00b7 libpq-envars.html", "anchor": "", "sha256": "af62a12e22e80fff7cb75a6a7760562861c414f73a4afbd5ec2e1c2f1e9c94b9"}, {"url": "/docs/19/libpq-pgservice.html", "file": "libpq-pgservice.html", "label": "19rc2 English manual \u00b7 libpq-pgservice.html", "anchor": "", "sha256": "eb83c4af16f3d34aa873fc313fdf55560bbdf1803d195d723e6eb88c9d8dcea4"}], "zh_from": "same-version-manual", "facts_zh": [{"label": "\u5ba2\u6237\u7aef\u5e93", "value": "libpq 19rc2"}, {"label": "\u624b\u518c\u5b9a\u4e49", "value": "\u624b\u518c\u5df2\u8bb0\u8f7d"}, {"label": "\u6e90\u7801\u4e2d\u7684\u73af\u5883\u53d8\u91cf\u56de\u9000", "value": "\u9009\u9879\u8868\u4e2d\u672a\u58f0\u660e"}, {"label": "\u7f16\u8bd1\u65f6\u56de\u9000\u8868\u8fbe\u5f0f", "value": "NULL"}], "sections": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728 Microsoft Windows \u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL 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\uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "center_zh": {"locale": "zh-Hans", "payload": {"description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "description_zh_html": "<dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "body_html": "<dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd>", "body_sha256": "9c2462d217edbba935a9af0522b837aab472570965b51d54bac85e6e9cfa4df9", "content_hash": "ec7fdf5d4a9904ca6f4f48d3ab2e267fc2cd91ddd533908d61ea461e8fc079a5", "source_revision": "pgdoc:b9f0e7232f60f380d642ac9b99226606c254b552", "definition_version": "19", "documentation_release": "19rc2"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "related_zh": [{"url": "/docs/19/libpq-pgservice.html", "label": "\u8fde\u63a5\u670d\u52a1\u6587\u4ef6"}, {"url": "/docs/19/libpq-pgpass.html", "label": "\u53e3\u4ee4\u6587\u4ef6"}, {"url": "/docs/19/libpq-envars.html", "label": "\u6240\u6709 libpq \u73af\u5883\u53d8\u91cf"}], "description": ["\u63a7\u5236 TCP 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\u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd>", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", 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It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect."], "description_zh_html": "<dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd>", "precedence_evidence": ["The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. 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\u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/devel/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "version": "20", "link_map": {"/zh/docs/devel/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL": "/docs/devel/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/devel/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "e466501073084b99a75dc835c239eecc2c510edb662d90074e321ae4eb97d922", "content_hash": "b7043e930cdde7cd13442bcbba9fb26a837b4775343162d9d1ee1b490ef55eb0", "source_database": "center", "source_revision": "3cd0885bb4eccdbaac1a21177cc639e9031e54bd8ea6536c45224b5563354ce2"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "description": ["\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002"], "environment": [], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u5728 libpq \u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u4f7f\u7528 servicefile \u5173\u952e\u5b57\uff0c\u6216\u8005\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "localization": {"status": "complete", "sources": [{"url": "/docs/devel/libpq-envars.html", "method": "same-major semantic node", "sha256": "b4afd6d100d2be289d48e1a6f6fb9804dd0b684798b7dabf8bae7d3db074117f", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/devel/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "acea589bbba517979fe815bd3bff32cd6d5e6323e1d5b4f395d7864338868b26", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/summary": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "/category": "Timeouts and keepalives", "/versions/20/description/0": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "/versions/20/facts/0/label": "Client library", "/versions/20/facts/1/label": "Manual definition", "/versions/20/facts/1/value": "Documented", "/versions/20/facts/2/label": "Source environment fallback", "/versions/20/facts/2/value": "None declared in the option table", "/versions/20/facts/3/label": "Compiled fallback expression", "/versions/20/related/0/label": "Connection service file", "/versions/20/related/1/label": "Password file", "/versions/20/related/2/label": "All libpq environment variables", "/versions/20/sections/0/title": "Default resolution and service-file precedence", "/versions/20/sections/1/title": "Environment variable evidence", "/versions/20/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/20/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified using the servicefile key word in a libpq connection string or by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/20/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "e6d603a523873946be547d93a0c381a832383fa92b45095b95d5859b2005f8fe", "canonical_center_text_hash": "b7043e930cdde7cd13442bcbba9fb26a837b4775343162d9d1ee1b490ef55eb0"}, "source_option": {"keyword": "keepalives_interval", "declaration": "\"keepalives_interval\", NULL, NULL, NULL, \"TCP-Keepalives-Interval\", \"\", 10, offsetof(struct pg_conn, keepalives_interval)", "environment": "", "source_notes": [], "compiled_default_expression": "NULL"}, "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "comparison_data": {"keyword": "keepalives_interval", "definition": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. 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"\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code class=\"symbol\">TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "version": "18", "link_map": {"/zh/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL": "/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL"}, "body_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "eb8af934ad7b0b89956a742139f5c1e061f4e65b66021349ea248b2f40ca064c", "content_hash": "4e89a3231f023603e703b67216012f89f56c40fbfb37e3766e7270752180f834", "source_database": "center", "source_revision": "ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8"}, "signature": "keepalives_interval", "tables_zh": [], "documented": true, "description": ["\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002"], "environment": [], "manual_html": "", "manual_path": "libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL", "sections_zh": [{"title": "\u9ed8\u8ba4\u503c\u89e3\u6790\u4e0e\u670d\u52a1\u6587\u4ef6\u4f18\u5148\u7ea7", "paragraphs": ["\u4ee5\u4e0b\u73af\u5883\u53d8\u91cf\u53ef\u7528\u4e8e\u9009\u62e9\u8fde\u63a5\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\uff0c\u4f9b PQconnectdb \u3001 PQsetdbLogin \u548c PQsetdb \u5728\u8c03\u7528\u4ee3\u7801\u672a\u76f4\u63a5\u6307\u5b9a\u53c2\u6570\u503c\u65f6\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5728\u7b80\u5355\u7684\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u4e2d\u786c\u7f16\u7801\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002", "\u670d\u52a1\u540d\u79f0\u53ef\u4ee5\u5728\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u6216\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\u3002\u5982\u679c\u540c\u4e00\u4e2a\u670d\u52a1\u540d\u79f0\u5b58\u5728\u4e8e\u7528\u6237\u6587\u4ef6\u548c\u7cfb\u7edf\u6587\u4ef6\u4e2d\uff0c\u5219\u7528\u6237\u6587\u4ef6\u4f18\u5148\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7528\u6237\u7684\u670d\u52a1\u6587\u4ef6\u540d\u4e3a ~/.pg_service.conf \u3002\u5728Microsoft Windows\u4e0a\uff0c\u5b83\u7684\u540d\u79f0\u4e3a %APPDATA%\\postgresql\\.pg_service.conf \uff08\u5176\u4e2d %APPDATA% \u6307\u7528\u6237\u914d\u7f6e\u6587\u4ef6\u5939\u4e2d\u7684\u5e94\u7528\u6570\u636e\u5b50\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSERVICEFILE \u6765\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002\u7cfb\u7edf\u8303\u56f4\u7684\u6587\u4ef6\u540d\u4e3a pg_service.conf \u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5728 PostgreSQL \u5b89\u88c5\u7684 etc \u76ee\u5f55\u4e2d\u5bfb\u627e\uff08\u4f7f\u7528 pg_config --sysconfdir \u6765\u51c6\u786e\u8bc6\u522b\u6b64\u76ee\u5f55\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf PGSYSCONFDIR \u6765\u6307\u5b9a\u53e6\u4e00\u4e2a\u76ee\u5f55\uff0c\u4f46\u4e0d\u80fd\u6307\u5b9a\u4e0d\u540c\u7684\u6587\u4ef6\u540d\u3002", "\u4ece\u670d\u52a1\u6587\u4ef6\u4e2d\u83b7\u53d6\u7684\u8fde\u63a5\u53c2\u6570\u4f1a\u4e0e\u5176\u4ed6\u6765\u6e90\u7684\u53c2\u6570\u5408\u5e76\u3002\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u4f1a\u8986\u76d6\u76f8\u5e94\u7684\u73af\u5883\u53d8\u91cf\uff0c\u800c\u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u7ed9\u51fa\u7684\u503c\u53c8\u4f1a\u8986\u76d6\u670d\u52a1\u6587\u4ef6\u4e2d\u7684\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e0a\u8ff0\u670d\u52a1\u6587\u4ef6\u65f6\uff0c\u8fde\u63a5\u5b57\u7b26\u4e32 service=mydb port=5434 \u5c06\u4f7f\u7528\u4e3b\u673a somehost \u3001\u7aef\u53e3 5434 \u3001\u7528\u6237 admin \uff0c\u4ee5\u53ca\u7531\u73af\u5883\u53d8\u91cf\u6216\u5185\u7f6e\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u7684\u5176\u4ed6\u53c2\u6570\u3002"]}, {"title": "\u73af\u5883\u53d8\u91cf\u8bc1\u636e", "paragraphs": []}], "localization": {"status": "complete", "sources": [{"url": "/docs/18/libpq-envars.html", "method": "same-major semantic node", "sha256": "8423affb67ef7d4f700d7ccc8c0ef66629341568c8d72530a0c765f3d155da2f", "language": "zh", "matched_nodes": ["#LIBPQ-ENVARS/p[2]"]}, {"url": "/docs/18/libpq-pgservice.html", "method": "same-major semantic node", "sha256": "a06dfcdffbbdf6bd55987cade2d9ff1db6cbfd9f75eb80c7866e8792cd70463e", "language": "zh", "matched_nodes": ["#LIBPQ-PGSERVICE/p[5]", "#LIBPQ-PGSERVICE/p[9]"]}], "language": "zh", "original_text": {"/versions/18/description/0": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "/versions/18/facts/0/label": "Client library", "/versions/18/facts/1/label": "Manual definition", "/versions/18/facts/1/value": "Documented", "/versions/18/facts/2/label": "Source environment fallback", "/versions/18/facts/2/value": "None declared in the option table", "/versions/18/facts/3/label": "Compiled fallback expression", "/versions/18/related/0/label": "Connection service file", "/versions/18/related/1/label": "Password file", "/versions/18/related/2/label": "All libpq environment variables", "/versions/18/sections/0/title": "Default resolution and service-file precedence", "/versions/18/sections/1/title": "Environment variable evidence", "/versions/18/sections/0/paragraphs/0": "The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "/versions/18/sections/0/paragraphs/1": "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "/versions/18/sections/0/paragraphs/2": "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "0ec8a35a67914ce6033758e68c1d89f78fbaa3479faf375ac3fc97d5e9f30161", "canonical_center_text_hash": "4e89a3231f023603e703b67216012f89f56c40fbfb37e3766e7270752180f834"}, "source_option": {"keyword": "keepalives_interval", "declaration": "\"keepalives_interval\", NULL, NULL, NULL, \"TCP-Keepalives-Interval\", \"\", 10, offsetof(struct pg_conn, keepalives_interval)", "environment": "", "source_notes": [], "compiled_default_expression": "NULL"}, "description_zh": "\u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 TCP_KEEPINTVL \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002", "comparison_data": {"keyword": "keepalives_interval", "definition": "Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect.", "documented": true, "environment": "", "default_evidence": ["Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect."], "compiled_default_expression": "NULL"}, "comparison_hash": "75920db0eaf6fbffaa1344442a9e9996da9483c0aaa600b42f78bdbfed6d6bb9", "manual_language": "zh", "default_evidence": ["Controls the number of seconds after which a TCP keepalive message that is not acknowledged by the server should be retransmitted. A value of zero uses the system default. This parameter is ignored for connections made via a Unix-domain socket, or if keepalives are disabled. It is only supported on systems where TCP_KEEPINTVL or an equivalent socket option is available, and on Windows; on other systems, it has no effect."], "description_zh_html": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/zh/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "precedence_evidence": ["The following environment variables can be used to select default connection parameter values, which will be used by PQconnectdb , PQsetdbLogin and PQsetdb if no value is directly specified by the calling code. These are useful to avoid hard-coding database connection information into simple client applications, for example.", "Service names can be defined in either a per-user service file or a system-wide file. If the same service name exists in both the user and the system file, the user file takes precedence. By default, the per-user service file is named ~/.pg_service.conf . On Microsoft Windows, it is named %APPDATA%\\postgresql\\.pg_service.conf (where %APPDATA% refers to the Application Data subdirectory in the user's profile). A different file name can be specified by setting the environment variable PGSERVICEFILE . The system-wide file is named pg_service.conf . By default it is sought in the etc directory of the PostgreSQL installation (use pg_config --sysconfdir to identify this directory precisely). Another directory, but not a different file name, can be specified by setting the environment variable PGSYSCONFDIR .", "Connection parameters obtained from a service file are combined with parameters obtained from other sources. A service file setting overrides the corresponding environment variable, and in turn can be overridden by a value given directly in the connection string. For example, using the above service file, a connection string service=mydb port=5434 will use host somehost , port 5434 , user admin , and other parameters as set by environment variables or built-in defaults."], "center_zh_rendered": "<p>\u8fde\u63a5\u53c2\u6570 keepalives_interval\u3002</p><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u5b9a\u4e49</h3><dd><p>\n       \u63a7\u5236\u672a\u88ab\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230\u7684 TCP keepalive \u6d88\u606f\u5728\u591a\u5c11\u79d2\u540e\u5e94\u88ab\u91cd\u4f20\u3002\u503c\u4e3a\u96f6\u65f6\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u901a\u8fc7 Unix \u57df\u5957\u63a5\u5b57\u5efa\u7acb\u7684\u8fde\u63a5\uff0c\u6216\u7981\u7528 keepalive \u65f6\uff0c\u6b64\u53c2\u6570\u4f1a\u88ab\u5ffd\u7565\u3002\u6b64\u53c2\u6570\u4ec5\u5728\u652f\u6301 <code>TCP_KEEPINTVL</code> \u6216\u7b49\u6548\u5957\u63a5\u5b57\u9009\u9879\u7684\u7cfb\u7edf\u4ee5\u53ca Windows \u4e0a\u53d7\u652f\u6301\uff1b\u5728\u5176\u4ed6\u7cfb\u7edf\u4e0a\u65e0\u6548\u3002\n      </p></dd><p><a href=\"/docs/18/libpq-connect.html#LIBPQ-KEEPALIVES-INTERVAL\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "comparison": {"left": "17", "right": "18", "status": "unchanged", "diff": ""}}