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No per-field reset rule is inferred from the field name.", "/versions/16/sections/2/paragraphs/0": "Example query; no execution result or measured value is asserted."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "6cd7a9a60e31c6504c5b03893d598627f81920b7f06dfc0ea2b6db8e2209bab8"}, "comparison_data": {"view": "pg_stat_wal", "field": "wal_sync_time", "sql_type": "double precision", "units_mentioned": ["milliseconds"]}, "comparison_hash": "d7b7f45d9ce13a64d7e0bd112f00c72932dd1e87d7dd6e875ee9b283cbc4d0f3", "units_mentioned": ["milliseconds"]}, "17": {"view": "pg_stat_wal", "facts": [{"label": "\u89c6\u56fe", "value": "pg_stat_wal"}, {"label": "\u5b57\u6bb5", "value": "wal_sync_time"}, {"label": "SQL \u7c7b\u578b", "value": "double precision"}, {"label": "\u5b57\u6bb5\u5b9a\u4e49\u8bb0\u8f7d\u7684\u5355\u4f4d", "value": "milliseconds"}, {"label": "\u91cd\u7f6e\u6761\u4ef6", "value": "\u8fd9\u4e9b\u7edf\u8ba1\u4e0a\u6b21\u91cd\u7f6e\u7684\u65f6\u95f4"}], "field": "wal_sync_time", "tables": [], "related": [{"url": "/wiki/catalog/pg_stat_wal/?v=17", "label": "pg_stat_wal \u5b57\u6bb5"}, {"url": "/docs/17/monitoring-stats.html", "label": "\u7edf\u8ba1\u6536\u96c6\u4e0e\u91cd\u7f6e\u51fd\u6570"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v17.11/postgresql-17.11.tar.bz2", "label": "17.11", "major": "17", "channel": "stable", "revision": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "sources": [{"url": "https://pg.center/docs/17/monitoring-stats.html#PG-STAT-WAL-VIEW", "path": "monitoring-stats.html", "label": "PostgreSQL 17 English manual", "sha256": "007af6e8ab39b925963273ec3ba7f06f8ee6fbfaad821f07a1dc78383dbb9b99", "language": "en", "original_url": "/docs/17/monitoring-stats.html#PG-STAT-WAL-VIEW"}], "sections": [{"title": "\u89c6\u56fe\u8bed\u4e49", "paragraphs": ["pg_stat_wal \u89c6\u56fe\u4e00\u76f4\u6709\u4e00\u884c\uff0c\u5305\u542b\u5173\u4e8e\u96c6\u7c07\u7684WAL\u6d3b\u52a8\u7684\u6570\u636e\u3002"]}, {"title": "\u91c7\u96c6\u4e0e\u91cd\u7f6e\u8bed\u4e49", "paragraphs": ["\u91cd\u7f6e\u8303\u56f4\u548c\u53ef\u89c1\u6027\u8bf7\u53c2\u9605\u4e0b\u65b9\u540c\u7248\u672c\u7684\u7edf\u8ba1\u4fe1\u606f\u6536\u96c6\u4e0e\u89c6\u56fe\u6587\u6863\u3002\u4e0d\u6839\u636e\u5b57\u6bb5\u540d\u79f0\u63a8\u65ad\u5404\u5b57\u6bb5\u7684\u91cd\u7f6e\u89c4\u5219\u3002"]}, {"code": "SELECT wal_sync_time FROM pg_catalog.pg_stat_wal;", "title": "\u67e5\u770b\u6b64\u5b57\u6bb5", "paragraphs": ["\u793a\u4f8b\u67e5\u8be2\uff1b\u4e0d\u8868\u793a\u5df2\u6267\u884c\uff0c\u4e5f\u4e0d\u63d0\u4f9b\u5b9e\u6d4b\u503c\u3002"]}], "sql_type": "double precision", "signature": "SELECT wal_sync_time FROM pg_catalog.pg_stat_wal;", "documented": true, "description": ["\u901a\u8fc7 issue_xlog_fsync \u8bf7\u6c42\u5c06 WAL \u6587\u4ef6\u540c\u6b65\u5230\u78c1\u76d8\u6240\u82b1\u8d39\u7684\u603b\u65f6\u95f4\uff0c\u5355\u4f4d\u4e3a\u6beb\u79d2\uff08\u4ec5\u5f53\u542f\u7528 track_wal_io_timing\u3001fsync \u4e3a on\uff0c\u4e14 wal_sync_method \u4e3a fdatasync\u3001fsync \u6216 fsync_writethrough \u65f6\u7edf\u8ba1\uff0c\u5426\u5219\u4e3a\u96f6\uff09\u3002"], "manual_html": "", "manual_path": "/docs/17/monitoring-stats.html", "source_only": false, "localization": {"status": "complete", "sources": [{"url": "/docs/17/monitoring-stats.html", "method": "same-major semantic node", "sha256": "5cd346cc373a5a006b07664d9969d4c630c8ea55dea33b8f3211f061ce43e54f", "language": "zh", "matched_nodes": ["#MONITORING-STATS/div[20]/p[2]"]}], "language": "zh", "original_text": {"/summary": "Total amount of time spent syncing WAL files to disk via issue_xlog_fsync request, in milliseconds (if track_wal_io_timing is enabled, fsync is on, and wal_sync_method is either fdatasync, fsync or fsync_writethrough, otherwise zero).", "/versions/17/description/0": "Total amount of time spent syncing WAL files to disk via issue_xlog_fsync request, in milliseconds (if track_wal_io_timing is enabled, fsync is on, and wal_sync_method is either fdatasync, fsync or fsync_writethrough, otherwise zero).", "/versions/17/facts/0/label": "View", "/versions/17/facts/1/label": "Field", "/versions/17/facts/2/label": "SQL type", "/versions/17/facts/3/label": "Units named in the field definition", "/versions/17/facts/4/label": "Reset observation", "/versions/17/facts/4/value": "Time at which these statistics were last reset", "/versions/17/related/0/label": "pg_stat_wal columns", "/versions/17/related/1/label": "Statistics collection and reset functions", "/versions/17/sections/0/title": "View semantics", "/versions/17/sections/1/title": "Collection and reset context", "/versions/17/sections/2/title": "Inspect this field", "/versions/17/sections/0/paragraphs/0": "The pg_stat_wal view will always have a single row, containing data about WAL activity of the cluster.", "/versions/17/sections/1/paragraphs/0": "Read the same-version statistics collection and view documentation below for reset scope and visibility. No per-field reset rule is inferred from the field name.", "/versions/17/sections/2/paragraphs/0": "Example query; no execution result or measured value is asserted."}, "fallback_fields": [], "source_language": "en", "original_snapshot_sha256": "a602071dd5a0f34d82c1b69b6ac8602c34f6019a19d90b25cf46fbe809871a6f"}, "comparison_data": {"view": "pg_stat_wal", "field": "wal_sync_time", "sql_type": "double precision", "units_mentioned": ["milliseconds"]}, "comparison_hash": "d7b7f45d9ce13a64d7e0bd112f00c72932dd1e87d7dd6e875ee9b283cbc4d0f3", "units_mentioned": ["milliseconds"]}}}, "snapshot": null, "comparison": {"left": "17", "right": "18", "status": "removed", "diff": "--- PostgreSQL 17\n+++ PostgreSQL 18\n@@ -1,8 +1 @@\n-{\n-  \"field\": \"wal_sync_time\",\n-  \"sql_type\": \"double precision\",\n-  \"units_mentioned\": [\n-    \"milliseconds\"\n-  ],\n-  \"view\": \"pg_stat_wal\"\n-}\n+\u8be5\u7248\u672a\u6536\u5f55"}}