Re: pgbench cpu overhead (was Re: lazy vxid locks, v1)

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>
Cc: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org, Robert Haas <robertmhaas(at)gmail(dot)com>
Subject: Re: pgbench cpu overhead (was Re: lazy vxid locks, v1)
Date: 2011-07-24 15:55:04
Message-ID: 12562.1311522904@sss.pgh.pa.us
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Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc> writes:
> interesting - iirc we actually had some reports about current libpq
> behaviour causing scaling issues on some OSes - see
> http://archives.postgresql.org/pgsql-hackers/2009-06/msg00748.php and
> some related threads. Iirc the final patch for that was never applied
> though and the original author lost interest, I think that I was able to
> measure some noticable performance gains back in the days but I don't
> think I still have the numbers somewhere.

Huh? That patch did get applied in some form or other -- at least,
libpq does contain references to both SO_NOSIGPIPE and MSG_NOSIGNAL
these days.

regards, tom lane

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