Aggressive vacuum frequency on a table
Hi list,
The PostgreSQL documentation says in
https://www.postgresql.org/docs/15/routine-vacuuming.html#VACUUM-FOR-STATISTICS
:
*The maximum time that a table can go unvacuumed is two billion
transactions minus the vacuum_freeze_min_age value at the time of the last
aggressive vacuum.*
*...*
*This implies that if a table is not otherwise vacuumed, autovacuum will be
invoked on it approximately once every autovacuum_freeze_max_age minus
vacuum_freeze_min_age transactions.*
From what I have understood, a table is eligible for aggressive vacuum when
it reaches vacuum_freeze_table_age.
Then each table row becomes eligible when it reaches vacuum_freeze_min_age.
The autovacuum frequency would be then *autovacuum_freeze_max_age minus
vacuum_freeze_table_age transactions* (and not *autovacuum_freeze_max_age
minus vacuum_freeze_min_age transactions).*
Thanks for any answer
Regards
Simon