Wiki / Configuration Parameters
track_wal_io_timing
Enables timing of WAL I/O waits. This parameter is off by default, as it will repeatedly query the operating system for the current time, which may cause significant overhead on some platforms. You can use the pg_test_timing tool to measure the overhead of timing on your system. I/O timing information is displayed in pg_stat_io for the object wal and in the output of the pg_stat_get_backend_io() function for the object wal. Only superusers and users with the appropriate SET privilege can change this setting.
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
- boot val
- off
- category
- Statistics / Cumulative Query and Index Statistics
- context
- superuser
- documented
- true
- enumvals
- Unknown
- extra desc
- Unknown
- lang
- en
- max val
- Unknown
- metadata version
- 18
- min val
- Unknown
- name
- track_wal_io_timing
- short desc
- Collects timing statistics for WAL I/O activity.
- source
- pg-settings-source-snapshot
- unit
- Unknown
- vartype
- bool
Definition PG 18
Enables timing of WAL I/O waits. This parameter is off by default, as it will repeatedly query the operating system for the current time, which may cause significant overhead on some platforms. You can use the pg_test_timing tool to measure the overhead of timing on your system. I/O timing information is displayed in pg_stat_io for the object wal and in the output of the pg_stat_get_backend_io() function for the object wal. Only superusers and users with the appropriate SET privilege can change this setting.
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Definition sources
center · PostgreSQL 18 · wiki-repair-20261023:25bc8ae6eb7d406270c7f1d5c8b9dad07845650ae0e545c5bb87b628ba561424
Text language: en · wiki-repair-20261023:25bc8ae6eb7d406270c7f1d5c8b9dad07845650ae0e545c5bb87b628ba561424