{"Entry":{"collection":"metric","key":"pg_stat_slru-blks_exists","name":"pg_stat_slru.blks_exists","aliases":["blks_exists","pg_stat_slru"],"metadata":{"aliases":["blks_exists","pg_stat_slru"],"category":"pg_stat_slru","content_hash":"172db1373f281cfb47a8caf52e5ececd6d8e7a40c926fb886c36ae3f5abcb9cd","derived_content_hash":"6077b99e3c307c5e8dee6ff820080fc8b276a2c341a33640a041cfd7545c2931","imported_at":"2026-09-30T00:40:46.134341+08:00","name":"pg_stat_slru.blks_exists","name_zh":"","slug":"pg_stat_slru-blks_exists","summary":"Number of blocks checked for existence for this SLRU"}},"Definition":{"Collection":"metric","Key":"pg_stat_slru-blks_exists","SourceDatabase":"center","Version":"18","SourceTable":"statistics_metric","SourceKey":"pg_stat_slru-blks_exists","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"comparison_data":{"field":"blks_exists","sql_type":"bigint","units_mentioned":["blocks"],"view":"pg_stat_slru"},"comparison_hash":"6b63a0c66d34e03721a0cc601162fff67af6520330484113f499f41888663c16","description":["Number of blocks checked for existence for this SLRU"],"description_zh":"为这个 SLRU 检查是否存在的块数","description_zh_html":"\u003cp\u003epg_stat_slru.blks_exists 统计字段。\u003c/p\u003e\u003cdl\u003e\u003cdt\u003e视图\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003epg_stat_slru\u003c/code\u003e\u003c/dd\u003e\u003cdt\u003e字段\u003c/dt\u003e\u003cdd\u003e\u003ccode\u003eblks_exists\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为这个 SLRU 检查是否存在的块数\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_slru"},{"label":"Field","value":"blks_exists"},{"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_slru"},{"label":"字段","value":"blks_exists"},{"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_exists","manual_html":"","manual_path":"/docs/18/monitoring-stats.html","related":[{"label":"pg_stat_slru columns","url":"/wiki/catalog/pg_stat_slru/?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":["PostgreSQL accesses certain on-disk information via SLRU (simple least-recently-used) caches. The pg_stat_slru view will contain one row for each tracked SLRU cache, showing statistics about access to cached pages.\n\nFor each SLRU cache that's part of the core server, there is a configuration parameter that controls its size, with the suffix _buffers appended."],"title":"View semantics"},{"paragraphs":["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."],"title":"Collection and reset context"},{"code":"SELECT blks_exists FROM pg_catalog.pg_stat_slru;","paragraphs":["Example query; no execution result or measured value is asserted."],"title":"Inspect this field"}],"sections_zh":[{"paragraphs":["PostgreSQL 通过 SLRU（简单最近最少使用）缓存访问某些磁盘信息。pg_stat_slru 视图为每个跟踪的 SLRU 缓存提供一行，显示其缓存页访问统计。对于核心服务器中的每个 SLRU 缓存，都有一个名称以 _buffers 为后缀的配置参数来控制其大小。"],"title":"视图语义"},{"paragraphs":["重置范围和可见性请参阅下方同版本的统计信息收集与视图文档。不根据字段名称推断各字段的重置规则。"],"title":"采集与重置语义"},{"code":"SELECT blks_exists FROM pg_catalog.pg_stat_slru;","paragraphs":["示例查询；不表示已执行，也不提供实测值。"],"title":"查看此字段"}],"signature":"SELECT blks_exists FROM pg_catalog.pg_stat_slru;","source_only":false,"sources":[{"label":"PostgreSQL 18 English manual","path":"monitoring-stats.html","sha256":"aa979eed08627fbf715a9d792094a162a73671db5af810f3ab2aad3e073d5722","url":"/docs/18/monitoring-stats.html#PG-STAT-SLRU-VIEW"}],"sql_type":"bigint","tables":[],"tables_zh":[],"units_mentioned":["blocks"],"view":"pg_stat_slru","zh_from":{"authored_translation":"source-derived-structured-summary","body_sha256":"9315038a09432d6004a3ac5cbb36707302f82543c1a5db2160f6550f050444a1","kind":"same-version-chinese-manual-with-source-derived-structured-summary","manual":{"anchor":"","build_id":107,"column":"blks_exists","extraction":"exact-catalog-field","locale":"zh-Hans","page_key":"monitoring-stats.html","source_hash":"0274aac7991450316bcf7be44635653b6d896fb00e321242c1b6674cb05c2e53","source_revision":"unknown:rendered-translation-baseline","translation_revision":"git:b1b500221dbe5437cfca004d6b04d3f6e422765d;html-sha256:08e987a66af27b98444a8057c256314eafa13611a3fb9e888214fc436824244b","url":"/zh/docs/18/monitoring-stats.html#","version":"18"},"runtime_rerun":false,"source_facts_revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}},"ManualEvidence":{"manual_path":"/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"},"sources":[{"label":"PostgreSQL 18 English manual","path":"monitoring-stats.html","sha256":"aa979eed08627fbf715a9d792094a162a73671db5af810f3ab2aad3e073d5722","url":"/docs/18/monitoring-stats.html#PG-STAT-SLRU-VIEW"}]},"MeasuredEvidence":{}},"Text":{"Collection":"metric","Key":"pg_stat_slru-blks_exists","SourceDatabase":"center","Version":"18","Locale":"en","Title":"pg_stat_slru.blks_exists","Summary":"Number of blocks checked for existence for this SLRU","BodyHTML":"\u003cp\u003eNumber of blocks checked for existence for this SLRU\u003c/p\u003e","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","ContentHash":"73de64327bc3a1b4a0ff5badee3a5a9ac0ab174e820986c2569db8c989455754","Payload":{"description":["Number of blocks checked for existence for this SLRU"],"manual_html":"","related":[{"label":"pg_stat_slru columns","url":"/wiki/catalog/pg_stat_slru/?v=18"},{"label":"Statistics collection and reset functions","url":"/docs/18/monitoring-stats.html"}],"sections":[{"paragraphs":["PostgreSQL accesses certain on-disk information via SLRU (simple least-recently-used) caches. The pg_stat_slru view will contain one row for each tracked SLRU cache, showing statistics about access to cached pages.\n\nFor each SLRU cache that's part of the core server, there is a configuration parameter that controls its size, with the suffix _buffers appended."],"title":"View semantics"},{"paragraphs":["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."],"title":"Collection and reset context"},{"code":"SELECT blks_exists FROM pg_catalog.pg_stat_slru;","paragraphs":["Example query; no execution result or measured value is asserted."],"title":"Inspect this field"}],"tables":[]}},"RequestedLocale":"en","Fallback":false,"Versions":["13","14","15","16","17","18","19","20"],"Locales":["en","zh-Hans"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}