| 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 |
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| 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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