From: | "Philippe Lang" <philippe(dot)lang(at)attiksystem(dot)ch> |
---|---|
To: | <pgsql-general(at)postgresql(dot)org> |
Subject: | PG 8.1 on Dual XEON with FreeBSD 6.0 |
Date: | 2005-11-16 14:30:11 |
Message-ID: | 6C0CF58A187DA5479245E0830AF84F4218CC50@poweredge.attiksystem.ch |
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Lists: | pgsql-general |
Hi,
The FreeBSD 6.0 SMP Kernel recognizes my two XEONS as 4 CPUs.
A single postgresql query, as I could see in the top utility, can use a
maximum of 25% of CPU time, since it runs on one single virtual CPU,
which means for me "half of a XEON". Is that correct?
If yes, is there a way to change that, and accelerate long queries
(which are all CPU-bound) in giving them more processing time, like a
full XEON? Both XEONS? Should I disable Hyperthreading for that?
Thanks,
----------------------------------
Philippe Lang
Attik System
rte de la Fonderie 2
1700 Fribourg
Switzerland
http://www.attiksystem.ch
Tel: +41 (26) 422 13 75
Fax: +41 (26) 422 13 76
GSM: +41 (79) 351 49 94
Email: philippe(dot)lang(at)attiksystem(dot)ch
Skype: philippe.lang
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