Re: Seeking performance advice and explanation for high I/O on 8.3

From: "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
To: "Magnus Hagander" <magnus(at)hagander(dot)net>, "Scott Otis" <scott(dot)otis(at)intand(dot)com>
Cc: "Ivan Voras" <ivoras(at)freebsd(dot)org>, "Robert Haas" <robertmhaas(at)gmail(dot)com>, <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Seeking performance advice and explanation for high I/O on 8.3
Date: 2009-09-04 22:09:37
Message-ID: 4AA149D1020000250002AAF3@gw.wicourts.gov
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"Scott Otis" <scott(dot)otis(at)intand(dot)com> wrote:

> So is there anything I can do in 8.3 to help this? I have tried
> setting 'track_activities', 'track_counts' and 'autovacuum' to 'off'
> (which has reduced CPU and I/O a bit)

You're going to regret that very soon, unless you are *very* sure you
have adequate manual vacuums scheduled.

http://www.postgresql.org/docs/8.3/interactive/routine-vacuuming.html

-Kevin

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