I think that somewhere on this mailing list I read that autovacuum in such case looses some important information
and after database server restart will not behave as expected until VACUUM ANALYZE is executed.
----- Original Message ----
From: Alvaro Herrera <alvherre@commandprompt.com>
To: Tomasz Rakowski <mourawi@yahoo.com>
Cc: Matthew T. O'Connor <matthew@zeut.net>; pgsql-general@postgresql.org
Sent: Wednesday, June 27, 2007 2:50:40 PM
Subject: Re: [GENERAL] autovacumm not working ?
Tomasz Rakowski wrote:
> Matthew,
>
> Thank you for reply.
>
> I was trying to configure autovacuum for given table to be more aggressive (min=100, scale factor=0.01).
> Then waited for autovacuum to be activated for given table
> (watching Server status window; about 1000 updates/min, 30.000 rows
> in the table, so didn't have to wait too long).
Did you reload (pg_ctl reload) after changing the postgresql.conf
settings? Also note that you can alter values for a specific table by
putting them in the pg_autovacuum table.
--
Alvaro Herrera
http://www.amazon.com/gp/registry/5ZYLFMCVHXC"I am amazed at [the pgsql-sql] mailing list for the wonderful support, and
lack of hesitasion in answering a lost soul's question, I just wished the rest
of the mailing list could be like this." (Fotis)
(
http://archives.postgresql.org/pgsql-sql/2006-06/msg00265.php)