pg_stat_slru
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. For each SLRU cache that's part of the core server, there is a configuration parameter that controls its size, with the suffix _buffers appended.
English manual coverage begins with PostgreSQL 7.4. Source history and runtime observations have their own recorded version boundaries.
Reading PG 18·Select a recorded version
- kind
- statistics
- lang
- en
- measured attributes
- true
- metadata release
- 18.6
- runtime columns
- name, blks_zeroed, blks_hit, blks_read, blks_written, blks_exists, flushes, truncates, stats_reset
- runtime verified
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Definition PG 18
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. For each SLRU cache that's part of the core server, there is a configuration parameter that controls its size, with the suffix _buffers appended.
Catalog columns
| Column | Type | Nullability | Description |
|---|---|---|---|
| name | text | Nullable | Name of the SLRU |
| blks_zeroed | bigint | Nullable | Number of blocks zeroed during initializations |
| blks_hit | bigint | Nullable | Number of times disk blocks were found already in the SLRU, so that a read was not necessary (this only includes hits in the SLRU, not the operating system's file system cache) |
| blks_read | bigint | Nullable | Number of disk blocks read for this SLRU |
| blks_written | bigint | Nullable | Number of disk blocks written for this SLRU |
| blks_exists | bigint | Nullable | Number of blocks checked for existence for this SLRU |
| flushes | bigint | Nullable | Number of flushes of dirty data for this SLRU |
| truncates | bigint | Nullable | Number of truncates for this SLRU |
| stats_reset | timestamp with time zone | Nullable | Time at which these statistics were last reset |
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Complete source facts
documentation revision
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Full definition and evidence JSON
Definition sources
center · PostgreSQL 18 · catalog-bilingual-repair:d62feba0e37f39fda03d486dd2f4f669fab4ff4834dd54986a26c6fcda8be608
Text language: en · catalog-bilingual-repair:d62feba0e37f39fda03d486dd2f4f669fab4ff4834dd54986a26c6fcda8be608