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How does one enable autovacuum in PostgreSQL? I understand the purpose, I just can't find a simple answer regarding how to enable it.
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You can start the vacuum manually also. By running psql command vacuum full analyze verbose . It will take some time. Beware that this exclusively locks the tables and therefore might not be recommended for large productive databases.
The AUTOVACUUM daemon is enabled in the default configuration. The AUTOVACUUM daemon is made up of multiple processes that reclaim storage by removing obsolete data or tuples from the database.
This is on by default; however, track_counts must also be enabled for autovacuum to work. This parameter can only be set in the postgresql. conf file or on the server command line; however, autovacuuming can be disabled for individual tables by changing table storage parameters.
If you want to see the vacuum settings for a specific table: SELECT relname, reloptions FROM pg_class WHERE relname='tablename'; The general vacuum settings can be seen in postgresql. conf .
Autovacuum is on by default. For small databases just do nothing and everything will work fine. To confirm, check
SHOW autovacuum;
in psql. It should report on.
Large and busy databases sometimes require tuning to make autovacuum run more often, or focus more on busy queue tables. See the manual for details on tuning autovacuum.
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You can start the vacuum manually also. By running psql command vacuum full analyze verbose. It will take some time.
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