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Re: Usage up to 50% CPU

From: "Andres Retzlaff" <andres_retzlaff(at)hotmail(dot)com>
To: magnus(at)hagander(dot)net
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Usage up to 50% CPU
Date: 2007-04-27 08:10:48
Message-ID: BAY141-F1845ACAADC609F4311EA888B4F0@phx.gbl (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Hi Magnus,

in this case each CPU goes up to 50%, giveing me 50% total usage. I was 
specting as you say 1 query 100% cpu.

Any ideas?


On Fri, Apr 27, 2007 at 04:43:06AM +0000, Andres Retzlaff wrote:
 > Hi,
 > I have pg 8.1.4 running in
 > Windows XP Pro
 > wirh a Pentium D
 > and I notice that I can not use more than 50% of the cpus (Pentium D has 
 > cpus), how can I change the settings to use the 100% of it.

A single query will only use one CPU. If you have multiple parallell
clients, they will use the differnt CPUs.


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