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| author | Nathan Bossart <nathan@postgresql.org> | 2025-01-06 15:01:22 -0600 |
|---|---|---|
| committer | Nathan Bossart <nathan@postgresql.org> | 2025-01-06 15:01:22 -0600 |
| commit | c758119e5bfb47b38cf957f9a5a37ceae96fa9b3 (patch) | |
| tree | d94191ad4e777efe0d95f419245b2b55450d3ac0 /src/backend/utils/misc/postgresql.conf.sample | |
| parent | 5e68f6119268d8c76b860bb56014335697c687db (diff) | |
Allow changing autovacuum_max_workers without restarting.
This commit introduces a new parameter named
autovacuum_worker_slots that controls how many autovacuum worker
slots to reserve during server startup. Modifying this new
parameter's value does require a server restart, but it should
typically be set to the upper bound of what you might realistically
need to set autovacuum_max_workers. With that new parameter in
place, autovacuum_max_workers can now be changed with a SIGHUP
(e.g., pg_ctl reload).
If autovacuum_max_workers is set higher than
autovacuum_worker_slots, a WARNING is emitted, and the server will
only start up to autovacuum_worker_slots workers at a given time.
If autovacuum_max_workers is set to a value less than the number of
currently-running autovacuum workers, the existing workers will
continue running, but no new workers will be started until the
number of running autovacuum workers drops below
autovacuum_max_workers.
Reviewed-by: Sami Imseih, Justin Pryzby, Robert Haas, Andres Freund, Yogesh Sharma
Discussion: https://postgr.es/m/20240410212344.GA1824549%40nathanxps13
Diffstat (limited to 'src/backend/utils/misc/postgresql.conf.sample')
| -rw-r--r-- | src/backend/utils/misc/postgresql.conf.sample | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample index a2ac7575ca7..b2bc43383db 100644 --- a/src/backend/utils/misc/postgresql.conf.sample +++ b/src/backend/utils/misc/postgresql.conf.sample @@ -661,8 +661,9 @@ #autovacuum = on # Enable autovacuum subprocess? 'on' # requires track_counts to also be on. -#autovacuum_max_workers = 3 # max number of autovacuum subprocesses +autovacuum_worker_slots = 16 # autovacuum worker slots to allocate # (change requires restart) +#autovacuum_max_workers = 3 # max number of autovacuum subprocesses #autovacuum_naptime = 1min # time between autovacuum runs #autovacuum_vacuum_threshold = 50 # min number of row updates before # vacuum |