{"Entry":{"collection":"metric","key":"pg_stat_io-extend_time","name":"pg_stat_io.extend_time","aliases":["extend_time","pg_stat_io"],"metadata":{"aliases":["extend_time","pg_stat_io"],"category":"pg_stat_io","content_hash":"38f854f3b0729b60306960c0d5a279250867ba1d3f736004ba7f52efc8a72e20","derived_content_hash":"7e68c7a286ed2207058ac87543feb579a8a220cf3bc1164a4dda605b8b19a6e8","imported_at":"2026-09-30T00:40:45.656568+08:00","name":"pg_stat_io.extend_time","name_zh":"","slug":"pg_stat_io-extend_time","summary":"Time spent waiting for extend operations in milliseconds. 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(if track_io_timing is enabled and object is not wal, or if track_wal_io_timing is enabled and object is wal, otherwise zero)"],"description_zh":"等待扩展操作所花费的时间，以毫秒计（如果启用了 track_io_timing 且 object 不是 wal，或者启用了 track_wal_io_timing 且 object 是 wal；否则为零）。","description_zh_html":"\u003cp\u003epg_stat_io.extend_time 统计字段。\u003c/p\u003e\u003cdl\u003e\u003cdt\u003e视图\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003epg_stat_io\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e字段\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003eextend_time\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003eSQL 类型\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003edouble precision\u003c/code\u003e\u003c/dd\u003e\u003c/dl\u003e\u003ch3\u003e同版本中文手册定义\u003c/h3\u003e\u003cp\u003e等待扩展操作所花费的时间，以毫秒计（如果启用了 track_io_timing 且 object 不是 wal，或者启用了 track_wal_io_timing 且 object 是 wal；否则为零）。\u003c/p\u003e\u003cp\u003e\u003ca href=\"/zh/docs/18/monitoring-stats.html#\"\u003e查看完整中文手册与上下文\u003c/a\u003e。\u003c/p\u003e","documented":true,"facts":[{"label":"View","value":"pg_stat_io"},{"label":"Field","value":"extend_time"},{"label":"SQL type","value":"double precision"},{"label":"Units named in the field definition","value":"milliseconds"},{"label":"Reset observation","value":"Time at which these statistics were last reset."}],"facts_zh":[{"label":"视图","value":"pg_stat_io"},{"label":"字段","value":"extend_time"},{"label":"SQL 类型","value":"double precision"},{"label":"字段定义记载的单位","value":"milliseconds"},{"label":"重置条件","value":"这些统计信息上次被重置的时间。"}],"field":"extend_time","manual_html":"","manual_path":"/docs/18/monitoring-stats.html","related":[{"label":"pg_stat_io columns","url":"/wiki/catalog/pg_stat_io/?v=18"},{"label":"Statistics collection and reset functions","url":"/docs/18/monitoring-stats.html"}],"release":{"channel":"stable","label":"18.6","major":"18","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sections":[{"paragraphs":["The pg_stat_io view will contain one row for each combination of backend type, target I/O object, and I/O context, showing cluster-wide I/O statistics. 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