Wiki / Statistics & Metrics / pg_stat_wal
pg_stat_wal.wal_bytes
Total amount of WAL generated in bytes
Reading PostgreSQL 18.6.
Description
Total amount of WAL generated in bytes
- View
- pg_stat_wal
- Field
- wal_bytes
- SQL type
- numeric
- Units named in the field definition
- bytes
- Reset observation
- Time at which these statistics were last reset
Usage
SELECT wal_bytes 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_bytes 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 +1,8 @@
-Not recorded in this version
+{
+ "field": "wal_bytes",
+ "sql_type": "numeric",
+ "units_mentioned": [
+ "bytes"
+ ],
+ "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.