Re: Low Budget Performance

From: Andrew Sullivan <andrew(at)libertyrms(dot)info>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Low Budget Performance
Date: 2002-10-29 17:31:10
Message-ID: 20021029123110.M25851@mail.libertyrms.com
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On Tue, Oct 29, 2002 at 09:10:31AM -0800, Josh Berkus wrote:
>
> Out of curiousity, what is it with RAID 5? I've encountered the poor
> write performance too ... any idea why?

It largely depends on the controller and te implementation. It has
to do with the cost of calculating the checksum. If the
implementation of that is inefficient, the writes become inefficient.

A

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