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Date:      Thu, 1 Mar 2007 20:45:33 -0600
From:      Craig Boston <craig@tobuj.gank.org>
To:        "Jim C. Nasby" <decibel@decibel.org>
Cc:        smp@FreeBSD.org, hackers@FreeBSD.org, current@FreeBSD.org, Kris Kennaway <kris@obsecurity.org>
Subject:   Re: Progress on scaling of FreeBSD on 8 CPU systems
Message-ID:  <20070302024533.GA64754@nowhere>
In-Reply-To: <20070227221252.GD51916@decibel.org>
References:  <20070224213111.GB41434@xor.obsecurity.org> <20070227182511.GD29041@decibel.org> <20070227205951.GA56651@xor.obsecurity.org> <20070227221252.GD51916@decibel.org>

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On Tue, Feb 27, 2007 at 04:12:52PM -0600, Jim C. Nasby wrote:
> On Tue, Feb 27, 2007 at 03:59:52PM -0500, Kris Kennaway wrote:
> > 
> > I've mentioned this a couple of times, but postgresql didn't scale
> > well [on freebsd at least] when I tried it last year.  I hope to
> > revisit when I get time.
> 
> Let me know if you need help when you get to that point. Keep in mind
> that PostgreSQL's out-of-the-box configuration is pretty conservative,
> so you won't get good numbers that way.

I was kind of wondering that myself, especially as PostgreSQL uses a
multi-process model rather than threads.

It seems like it would benefit more from optimization of the Sys-V
semaphores and shared memory.

Craig



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