From: Tom Lane <tgl@sss.pgh.pa.us>
To: Dan Harris <fbsd@drivefaster.net>
Cc: PostgreSQL Performance <pgsql-performance@postgresql.org>
Subject: Re: Simple query showing 270 hours of CPU time
Date: Fri, 20 Jul 2007 14:12:26 -0400
Message-ID: <11835.1184955146@sss.pgh.pa.us> (raw)
In-Reply-To: <46A0EE6B.6040707@drivefaster.net>
References: <46A0D836.5090806@drivefaster.net>
<10727.1184949725@sss.pgh.pa.us>
<46A0EE6B.6040707@drivefaster.net>
Dan Harris <fbsd@drivefaster.net> writes:
> Since you mentioned the number of semops is distressingly high, does this
> indicate a tuning problem?
More like an old-version problem. We've done a lot of work on
concurrent performance since 8.0.x, and most likely you are hitting
one of the bottlenecks that have been solved since then.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, fbsd@drivefaster.net
Subject: Re: Simple query showing 270 hours of CPU time
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