Chester Kustarz <[EMAIL PROTECTED]> writes:
vacuum is to reclaim dead tuples. this means it depends on update andAgreed.
delete. analyze depends on data values/distribution. this means it depends on
insert, update, and delete. thus the dependencies are slightly different
between the 2 operations, an so you can come up with use-cases that
justify running either more frequently.
And that is why pg_autovacuum looks at insert, update and delete when deciding to do an analyze, but only looks at update and delete when deciding to do a vacuum. In addition, this is why pg_autovacuum was given knobs so that the vacuum and analyze thresholds can be set independently.
Matthew
---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
