From: Joshua D. Drake <jd@commandprompt.com>
To: Ron Mayer <rm_pg@cheapcomplexdevices.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Dual core Opterons beating quad core Xeons?
Date: Wed, 19 Dec 2007 12:02:57 -0800
Message-ID: <20071219120257.32d1fc50@commandprompt.com> (raw)
In-Reply-To: <fkbqho$1jsp$1@news.hub.org>
References: <476908BB.5090408@stuartbishop.net>
<Pine.GSO.4.64.0712191322410.29296@westnet.com>
<20071219105921.07b45a36@commandprompt.com>
<fkbqho$1jsp$1@news.hub.org>
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On Wed, 19 Dec 2007 11:14:08 -0800
Ron Mayer <rm_pg@cheapcomplexdevices.com> wrote:
> Joshua D. Drake wrote:
> > 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.... :)
>
> I agree with the spirit of what you say, but are you overstating
> things a bit?
My point was :)... which that PDF actually illustrates is the gain
between say 2 cores and 8 cores is greater than 8 and 16 and even
less when you go beyond 16.
>
> Benchmarks I see[1] suggest that 8.1.2 scaled pretty reasonably to 16
> cores (from the chart on page 9 in the link below). But yeah, 8.0
> scaled to maybe 2 cores if you're lucky. :-)
I really need to check this test out more though because their numbers
don't reflect mine. I wonder if that is per connection.
Sincerely,
Joshua D. Drake
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To: pgsql-performance@postgresql.org
Cc: jd@commandprompt.com, rm_pg@cheapcomplexdevices.com
Subject: Re: Dual core Opterons beating quad core Xeons?
In-Reply-To: <20071219120257.32d1fc50@commandprompt.com>
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