Wiki / Statistics & Metrics / pg_stat_wal
pg_stat_wal.wal_buffers_full
Number of times WAL data was written to disk because WAL buffers became full
Reading PostgreSQL 18.6.
Description
Number of times WAL data was written to disk because WAL buffers became full
- View
- pg_stat_wal
- Field
- wal_buffers_full
- SQL type
- bigint
- Units named in the field definition
- Not specified
- Reset observation
- Time at which these statistics were last reset
Usage
SELECT wal_buffers_full FROM pg_catalog.pg_stat_wal;View semantics
The pg_stat_wal view will always have a single row, containing data about WAL activity of the cluster.
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 wal_buffers_full FROM pg_catalog.pg_stat_wal;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 13 → 14: added.
--- PostgreSQL 13
+++ PostgreSQL 14
@@ -1 +1,6 @@
-Not recorded in this version
+{
+ "field": "wal_buffers_full",
+ "sql_type": "bigint",
+ "units_mentioned": [],
+ "view": "pg_stat_wal"
+}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 14 through 20; the first sample is not necessarily its introduction.