From: J. Andrew Rogers <jrogers@neopolitan.com>
To: pgsql-performance@postgresql.org
Subject: Re: Performance problems on 4/8way Opteron (dualcore)
Date: Sun, 31 Jul 2005 08:29:15 -0700
Message-ID: <BF123C5B.868%jrogers@neopolitan.com> (raw)
In-Reply-To: <dcfbtl$2msc$1@news.hub.org>
On 7/30/05 12:57 AM, "William Yu" <wyu@talisys.com> wrote:
> I haven't investigated the 2.6.12+ kernel updates yet -- I probably will
> do our development servers first to give it a test.
The kernel updates make the NUMA code dual-core aware, which apparently
makes a big difference in some cases but not in others. It makes some
sense, since multi-processor multi-core machines will have two different
types of non-locality instead of just one that need to be managed. Prior to
the v2.6.12 patches, a dual-core dual-proc machine was viewed as a quad-proc
machine.
The closest thing to a supported v2.6.12 kernel that I know of is FC4, which
is not really supported in the enterprise sense of course.
J. Andrew Rogers
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To: pgsql-performance@postgresql.org
Cc: jrogers@neopolitan.com
Subject: Re: Performance problems on 4/8way Opteron (dualcore)
In-Reply-To: <BF123C5B.868%jrogers@neopolitan.com>
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