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From: Joshua D. Drake <jd@commandprompt.com>
To: pgsql-performance@postgresql.org
Subject: Re: Performance
Date: Wed, 13 Apr 2011 17:37:05 -0700
Message-ID: <4DA641B1.4060707@commandprompt.com> (raw)
In-Reply-To: <1809.1302739389@sss.pgh.pa.us>
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On 04/13/2011 05:03 PM, Tom Lane wrote:
> That 4:1 ratio is based on some rather extensive experimentation that
> I did back in 2000.  In the interim, disk transfer rates have improved
> quite a lot more than disk seek times have, and the CPU cost to process
> a page's worth of data has also improved compared to the seek time.
My experience is that at least a 1/1 is more appropriate.

JD



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