From: John A Meinel <john@arbash-meinel.com>
To: Anjan Dave <adave@vantage.com>
Cc: Geoffrey <esoteric@3times25.net>
Cc: Mischa Sandberg <mischa.sandberg@telus.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: Whence the Opterons?
Date: Mon, 09 May 2005 10:40:07 -0500
Message-ID: <427F8457.6000001@arbash-meinel.com> (raw)
In-Reply-To: <4BAFBB6B9CC46F41B2AD7D9F4BBAF785026FF7D6@vt-pe2550-001.vantage.vantage.com>
References: <4BAFBB6B9CC46F41B2AD7D9F4BBAF785026FF7D6@vt-pe2550-001.vantage.vantage.com>
Anjan Dave wrote:
> Wasn't the context switching issue occurring in specific cases only?
>
> I haven't seen any benchmarks for a 50% performance difference. Neither
> have I seen any benchmarks of pure disk IO performance of specific
> models of Dell vs HP or Sun Opterons.
>
> Thanks,
> Anjan
>
Well, I'm speaking more from what I remember reading, than personal
testing. Probably 50% is too high, but I thought I remembered it being
more general than just specific cases.
I agree, though, that disk bandwidth is probably more important than CPU
issues, though. And the extra 15k might get you a lot of disk performance.
John
=:->
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To: pgsql-performance@postgresql.org
Cc: john@arbash-meinel.com, adave@vantage.com, esoteric@3times25.net, mischa.sandberg@telus.net
Subject: Re: Whence the Opterons?
In-Reply-To: <427F8457.6000001@arbash-meinel.com>
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