diff options
| author | Michael Paquier <michael@paquier.xyz> | 2021-09-25 15:12:04 +0900 |
|---|---|---|
| committer | Michael Paquier <michael@paquier.xyz> | 2021-09-25 15:12:04 +0900 |
| commit | 0872ccbfd8c988d69c79a93dd85f0e10f2ee6349 (patch) | |
| tree | 2dfe1befa737b665c7cfac2dae7c4c71001280aa /doc/src | |
| parent | c1ddcdb5c3a7687b71bcdd0b18b4ba5a2aa620b3 (diff) | |
doc: Improve description of index vacuuming with GUCs
Index vacuums may happen multiple times depending on the number of dead
tuples stored, as of maintenance_work_mem for a manual VACUUM. For
autovacuum, this is controlled by autovacuum_work_mem instead, if set.
The documentation mentioned the former, but not the latter in the
context of autovacuum.
Reported-by: Nikolai Berkoff
Author: Laurenz Albe, Euler Taveira
Discussion: https://postgr.es/m/161545365522.10134.12195402324485546870@wrigleys.postgresql.org
Backpatch-through: 9.6
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/monitoring.sgml | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml index c95bbb9e5a7..af3e9a71656 100644 --- a/doc/src/sgml/monitoring.sgml +++ b/doc/src/sgml/monitoring.sgml @@ -3909,8 +3909,9 @@ SELECT pg_stat_get_backend_pid(s.backendid) AS pid, <command>VACUUM</command> is currently vacuuming the indexes. If a table has any indexes, this will happen at least once per vacuum, after the heap has been completely scanned. It may happen multiple times per vacuum - if <xref linkend="guc-maintenance-work-mem"/> is insufficient to - store the number of dead tuples found. + if <xref linkend="guc-maintenance-work-mem"/> (or, in the case of autovacuum, + <xref linkend="guc-autovacuum-work-mem"/> if set) is insufficient to store + the number of dead tuples found. </entry> </row> <row> |