From: Joshua D. Drake <jd@commandprompt.com>
To: Ralph Mason <ralph.mason@telogis.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Ever Increasing IOWAIT
Date: Thu, 17 May 2007 16:02:34 -0700
Message-ID: <464CDF0A.5050309@commandprompt.com> (raw)
In-Reply-To: <011b01c798d5$141365a0$3c3a30e0$@mason@telogis.com>
References: <011b01c798d5$141365a0$3c3a30e0$@mason@telogis.com>
Ralph Mason wrote:
> We have a database running on a 4 processor machine. As time goes by
> the IO gets worse and worse peeking at about 200% as the machine loads up.
>
>
>
> The weird thing is that if we restart postgres itÂ’s fine for hours but
> over time it goes bad again.
>
>
>
> (CPU usage graph here
> http://www.flickr.com/photos/8347741@N02/502596262/ ) You can clearly
> see where the restart happens in the IO area
>
>
>
> This is Postgres 8.1.4 64bit.
1. Upgrade to 8.1.9. There is a bug with autovac that is fixed that is
pretty important.
>
>
>
> Anyone have any ideas?
>
Sure... you aren't analyzing enough. You are using prepared queries that
have plans that get stale... you are not running autovac... You are
cursed (kidding)..
Joshua D. Drake
>
>
> Thanks
>
> Ralph
>
>
>
>
> --
> Internal Virus Database is out-of-date.
> Checked by AVG Free Edition.
> Version: 7.5.432 / Virus Database: 268.15.9/573 - Release Date:
> 5/12/2006 4:07 p.m.
>
--
=== The PostgreSQL Company: Command Prompt, Inc. ===
Sales/Support: +1.503.667.4564 || 24x7/Emergency: +1.800.492.2240
Providing the most comprehensive PostgreSQL solutions since 1997
http://www.commandprompt.com/
Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate
PostgreSQL Replication: http://www.commandprompt.com/products/
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: jd@commandprompt.com, ralph.mason@telogis.com
Subject: Re: Ever Increasing IOWAIT
In-Reply-To: <464CDF0A.5050309@commandprompt.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox