{"Entry":{"collection":"metric","key":"pg_stat_database-blks_hit","name":"pg_stat_database.blks_hit","aliases":["blks_hit","pg_stat_database"],"metadata":{"aliases":["blks_hit","pg_stat_database"],"category":"pg_stat_database","content_hash":"bff86df9c8a6654958bab9a5bad6c4820c9ed6286ec30332bb05fb13745c770c","derived_content_hash":"18a8d3ff63ea770adc0fdfa04327c2f1e158723d6bc03897a7101aa7e0bf97d9","imported_at":"2026-09-30T00:40:45.539337+08:00","name":"pg_stat_database.blks_hit","name_zh":"","slug":"pg_stat_database-blks_hit","summary":"Number of times disk blocks were found already in the buffer cache, so that a read was not necessary (this only includes hits in the PostgreSQL buffer cache, not the operating system's file system cache)"}},"Definition":{"Collection":"metric","Key":"pg_stat_database-blks_hit","SourceDatabase":"center","Version":"18","SourceTable":"statistics_metric","SourceKey":"pg_stat_database-blks_hit","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"comparison_data":{"field":"blks_hit","sql_type":"bigint","units_mentioned":["blocks"],"view":"pg_stat_database"},"comparison_hash":"7156062377b6e397efac251273c2c952af37268c61fa4881d4f9921dfb009e35","description":["Number of times disk blocks were found already in the buffer cache, so that a read was not necessary (this only includes hits in the PostgreSQL buffer cache, not the operating system's file system cache)"],"description_zh":"在缓冲区缓存中发现磁盘块、因而无需读取的次数（这里只统计 PostgreSQL 缓冲区缓存中的命中，不包括操作系统文件系统缓存中的命中）","description_zh_html":"\u003cp\u003epg_stat_database.blks_hit 统计字段。\u003c/p\u003e\u003cdl\u003e\u003cdt\u003e视图\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003epg_stat_database\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e字段\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003eblks_hit\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003eSQL 类型\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003ebigint\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在缓冲区缓存中发现磁盘块、因而无需读取的次数（这里只统计 PostgreSQL 缓冲区缓存中的命中，不包括操作系统文件系统缓存中的命中）\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_database"},{"label":"Field","value":"blks_hit"},{"label":"SQL type","value":"bigint"},{"label":"Units named in the field definition","value":"blocks"},{"label":"Reset observation","value":"Time at which these statistics were last reset"}],"facts_zh":[{"label":"视图","value":"pg_stat_database"},{"label":"字段","value":"blks_hit"},{"label":"SQL 类型","value":"bigint"},{"label":"字段定义记载的单位","value":"blocks"},{"label":"重置条件","value":"这些统计上次重置的时间"}],"field":"blks_hit","manual_html":"","manual_path":"/docs/18/monitoring-stats.html","related":[{"label":"pg_stat_database columns","url":"/wiki/catalog/pg_stat_database/?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_database view will contain one row for each database in the cluster, plus one for shared objects, showing database-wide statistics."],"title":"View semantics"},{"paragraphs":["Read the same-version statistics collection and view documentation below for reset scope and visibility. 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