Re: High cpu usage after many inserts

From: Greg Williamson <gwilliamson39(at)yahoo(dot)com>
To: Aidan Van Dyk <aidan(at)highrise(dot)ca>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: High cpu usage after many inserts
Date: 2009-02-25 00:29:00
Message-ID: 83959.19769.qm@web46110.mail.sp1.yahoo.com
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--- On Wed, 2/25/09, Jordan Tomkinson <jordan(at)moodle(dot)com> wrote:

<...>

> What exactly is wrong with RAID5 and what should we have
> gone with?

RAID10 is often used. As others have pointed out, it is very slow for random writes. It also has issues that expose your data to total loss, see for instance <http://www.miracleas.com/BAARF/RAID5_versus_RAID10.txt>.

HTH,

Greg Williamson

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