From: Tom Lane <tgl@sss.pgh.pa.us>
To: Craig James <cjames@emolecules.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Hyperthreading (was: Two identical systems, radically different performance)
Date: Tue, 09 Oct 2012 16:53:12 -0400
Message-ID: <6247.1349815992@sss.pgh.pa.us> (raw)
In-Reply-To: <CAFwQ8revW5Ez6uCUqPeUFVHh0pdy0OZKv8_nM0SvxHgTM055EQ@mail.gmail.com>
References: <CAFwQ8revW5Ez6uCUqPeUFVHh0pdy0OZKv8_nM0SvxHgTM055EQ@mail.gmail.com>
Craig James <cjames@emolecules.com> writes:
> I've confirmed that hyperthreading causes a huge drop in performance on a
> 2x4-core Intel Xeon E5620 2.40GHz system. The bottom line is:
Interesting.
> I'll be upgrading to 8.4.14 and making more changes to postgres.conf based
> on feedback. The server is available for a day or so for more tests if
> anyone has suggestions.
It would be nice to see similar tests done with 9.2. 8.4 is kind of old
news as far as server performance is concerned.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, cjames@emolecules.com
Subject: Re: Hyperthreading (was: Two identical systems, radically different performance)
In-Reply-To: <6247.1349815992@sss.pgh.pa.us>
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