From: Dennis <dennis@works4me.com>
To: David Mitchell <david.mitchell@telogis.com>
Cc: Qingqing Zhou <zhouqq@cs.toronto.edu>
Cc: pgsql-performance@postgresql.org
Subject: Re: performance problems ... 100 cpu utilization
Date: Wed, 13 Jul 2005 23:54:38 -0700
Message-ID: <42D60C2E.3020004@works4me.com> (raw)
In-Reply-To: <42D5F315.3090301@telogis.com>
References: <42D567DB.6000100@works4me.com>
<db4l9c$1g4t$1@news.hub.org>
<42D5DBEB.4010503@works4me.com>
<42D5F315.3090301@telogis.com>
David Mitchell wrote:
> What is the load average on this machine? Do you do many updates? If
> you do a lot of updates, perhaps you haven't vacuumed recently. We
> were seeing similar symptoms when we started load testing our stuff
> and it turned out we were vacuuming too infrequently.
The load average at the 100% utilization point was about 30! A vacuum
analyze was done before the test was started. I believe there are many
more selects than updates happening at any one time.
Dennis
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To: pgsql-performance@postgresql.org
Cc: dennis@works4me.com, david.mitchell@telogis.com, zhouqq@cs.toronto.edu
Subject: Re: performance problems ... 100 cpu utilization
In-Reply-To: <42D60C2E.3020004@works4me.com>
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