Wiki / Statistics & Metrics / pg_stat_slru
pg_stat_slru.blks_written
Number of disk blocks written for this SLRU
Reading PostgreSQL 18.6.
Description
Number of disk blocks written for this SLRU
- View
- pg_stat_slru
- Field
- blks_written
- SQL type
- bigint
- Units named in the field definition
- blocks
- Reset observation
- Time at which these statistics were last reset
Usage
SELECT blks_written FROM pg_catalog.pg_stat_slru;View semantics
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.
Collection and reset context
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.
Inspect this field
Example query; no execution result or measured value is asserted.
SELECT blks_written FROM pg_catalog.pg_stat_slru;Related entries
Documentation and source
Source build
- Version
- 18.6
- Build
- https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2
- Source fingerprint
555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f
Compare versions
PostgreSQL 12 → 13: added.
--- PostgreSQL 12
+++ PostgreSQL 13
@@ -1 +1,8 @@
-Not recorded in this version
+{
+ "field": "blks_written",
+ "sql_type": "bigint",
+ "units_mentioned": [
+ "blocks"
+ ],
+ "view": "pg_stat_slru"
+}Compares recorded interfaces and attributes. Source fingerprints and build metadata are excluded; an absent sample is not proof of the introduction or removal release.
Related entries
Export JSON · Back to Statistics & Metrics · Recorded in PostgreSQL 13 through 20; the first sample is not necessarily its introduction.