{"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","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"],"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"}],"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"}],"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":[],"units_mentioned":["blocks"],"view":"pg_stat_slru"},"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":"zh-Hans","Fallback":true,"Versions":["13","14","15","16","17","18","19","20"],"Locales":["en"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}