Re: CPU_COUNT

From: John Hurley <johnbhurley_at_sbcglobal.net>
Date: Fri, 4 Sep 2009 11:24:27 -0700 (PDT)
Message-ID: <9f340c49-f001-4ddb-ac51-cc9a1eb348d6_at_g19g2000yqo.googlegroups.com>

On Sep 4, 2:09 pm, Sue <suesch..._at_gmail.com> wrote:

snip

> Does anyone know what CPU_COUNT means on a mulit-core machine?  Say
> you have a four core cpu.  Does setting CPU_COUNT to 1 use all 4 cores
> on 1 CPU or 1 core on a CPU?

Each core looks like to oracle a cpu ... this is not a throttling or hard/soft partitioning mechanism.

Never heard of anyone trying to set it directly ... oracle picks it up from the operating system.

If you have a system that does some kind of hard partition of cpu resources then oracle only see's what is available in that partition ( so sets CPU_COUNT correctly ).

There's a bunch of info in metalink on this ...

http://download.oracle.com/docs/cd/B28359_01/server.111/b28320/initparams038.htm Received on Fri Sep 04 2009 - 13:24:27 CDT