From: Joshua D. Drake <jd@commandprompt.com>
To: Greg Smith <gsmith@gregsmith.com>
Cc: Stuart Bishop <stuart@stuartbishop.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: Dual core Opterons beating quad core Xeons?
Date: Wed, 19 Dec 2007 10:59:21 -0800
Message-ID: <20071219105921.07b45a36@commandprompt.com> (raw)
In-Reply-To: <Pine.GSO.4.64.0712191322410.29296@westnet.com>
References: <476908BB.5090408@stuartbishop.net>
<Pine.GSO.4.64.0712191322410.29296@westnet.com>
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On Wed, 19 Dec 2007 13:50:29 -0500 (EST)
Greg Smith <gsmith@gregsmith.com> wrote:
> > With PG 8.2 and 8.3, is it still pretty much limited to 8 cores
> > making 2 of the quad core Xeons redundant or detrimental?
>
> Where'd you get the idea 8 cores was a limit? As cores go up
> eventually you run out of disk or memory bandwidth, but how that
> plays out is very application dependant and there's no hard line
> anywhere.
Actually this is not true. Although I have yet to test 8.3. It is
pretty much common knowledge that after 8 cores the acceleration of
performance drops with PostgreSQL...
This has gotten better every release. 8.1 for example handles 8 cores
very well, 8.0 didn't and 7.4 well.... :)
Sincerely,
Joshua D. Drake
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To: pgsql-performance@postgresql.org
Cc: jd@commandprompt.com, gsmith@gregsmith.com, stuart@stuartbishop.net
Subject: Re: Dual core Opterons beating quad core Xeons?
In-Reply-To: <20071219105921.07b45a36@commandprompt.com>
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