Re: Performance Issues on Opteron Dual Core

From: "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>
To: Magnus Hagander <mha(at)sollentuna(dot)net>
Cc: Jan de Visser <jdevisser(at)digitalfairway(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Performance Issues on Opteron Dual Core
Date: 2006-05-04 17:49:07
Message-ID: 20060504174907.GN97354@pervasive.com
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On Wed, May 03, 2006 at 09:29:15AM +0200, Magnus Hagander wrote:
> > > > FWIW, I've found problems running PostgreSQL on Windows in a
> > > > multi-CPU environment on w2k3. It runs fine for some period, and
> > > > then CPU and throughput drop to zero. So far I've been unable to
> > > > track down any more information than that, other than the
> > fact that
> > > > I haven't been able to reproduce this on any single-CPU machines.
> > >
> > > I have had previous correspondence about this with Magnus (search
> > > -general and -hackers). If you uninstall SP1 the problem
> > goes away. We
> > > played a bit with potential fixes but didn't find any.
> >
> > Interesting; does SP2 fix the problem? Anything we can do
> > over here to help?
>
> There is no SP2 for Windows 2003.
>
> Have you tried this with latest-and-greatest CVS HEAD? Meaning with the
> new semaphore code that was committed a couple of days ago?

I'd be happy to test this if someone could provide a build, or if
there's instructions somewhere for doing such a build...
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461

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