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From: Alvaro Herrera <alvherre@commandprompt.com>
To: Scott Carey <scott@richrelevance.com>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Jignesh K. Shah <J.K.Shah@sun.com>
Cc: Greg Smith <gsmith@gregsmith.com>
Cc: Kevin Grittner <Kevin.Grittner@wicourts.gov>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Proposal of tunable fix for scalability of 8.4
Date: Fri, 20 Mar 2009 18:05:13 -0400
Message-ID: <20090320220513.GS8313@alvh.no-ip.org> (raw)
In-Reply-To: <20090320215813.GR8313@alvh.no-ip.org>
References: <603c8f070903191349p5e8fb00as2816581d584fcefd@mail.gmail.com>
	<BDFBB77C9E07BE4A984DAAE981D19F961AEE7AFBB5@EXVMBX018-1.exch018.msoutlookonline.net>
	<20090320154601.GC8313@alvh.no-ip.org>
	<20090320215813.GR8313@alvh.no-ip.org>

Alvaro Herrera escribió:

> So Simon's correct.

And perhaps this explains why Jignesh is measuring an improvement on his
benchmark.  Perhaps an useful experiment would be to turn this behavior
off and compare performance.  This lack of measurement is probably the
cause that the suggested patch to fix it was never applied.

The patch is here
http://archives.postgresql.org//pgsql-hackers/2004-11/msg00935.php

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

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