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Re: auto vacuum settings

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Jeff Frost <jeff(at)frostconsultingllc(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: auto vacuum settings
Date: 2005-08-31 13:47:35
Message-ID: 1400.1125496055@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-admin
Jeff Frost <jeff(at)frostconsultingllc(dot)com> writes:
> Since we're on the vacuum kick these days, what's the best way to tell if my 
> autovacuum settings are working well?  I'm sure I can query some info out of 
> the pg_stats tables, no?

If the database isn't bloating (ie, physical storage growing faster than
valid data volume) then it's getting the job done.  Keep an eye on
"du $PGDATA" or pg_class.relpages entries.

> Also, if using autovacuum, should I still do a vacuum full on a regular 
> basis?

No.  Needing to do a VACUUM FULL would be prima facie evidence that
autovacuum *isn't* getting its job done.

			regards, tom lane

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