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Re: hyperthreaded cpu still an issue in 8.4?

From: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
To: Grzegorz Jaśkiewicz <gryzman(at)gmail(dot)com>
Cc: Doug Hunley <doug(at)hunley(dot)homeip(dot)net>, pgsql-performance(at)postgresql(dot)org
Subject: Re: hyperthreaded cpu still an issue in 8.4?
Date: 2009-07-21 14:17:30
Message-ID: dcc563d10907210717r128220ecn77ed587b7a665e4d@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
2009/7/21 Grzegorz Jaśkiewicz <gryzman(at)gmail(dot)com>:
> On Tue, Jul 21, 2009 at 1:42 PM, Doug Hunley<doug(at)hunley(dot)homeip(dot)net> wrote:
>> Just wondering is the issue referenced in
>> http://archives.postgresql.org/pgsql-performance/2005-11/msg00415.php
>> is still present in 8.4 or if some tunable (or other) made the use of
>> hyperthreading a non-issue. We're looking to upgrade our servers soon
>> for performance reasons and am trying to determine if more cpus (no
>> HT) or less cpus (with HT) are the way to go. Thx
>
> I wouldn't recommend HT CPUs at all. I think your assumption, that HT
> == CPU is wrong in first place.

Not sure the OP said that...

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