From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
---|---|
To: | Greg Smith <gsmith(at)gregsmith(dot)com> |
Cc: | Stuart Bishop <stuart(at)stuartbishop(dot)net>, pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Dual core Opterons beating quad core Xeons? |
Date: | 2007-12-19 18:59:21 |
Message-ID: | 20071219105921.07b45a36@commandprompt.com |
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Lists: | pgsql-performance |
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On Wed, 19 Dec 2007 13:50:29 -0500 (EST)
Greg Smith <gsmith(at)gregsmith(dot)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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