Re: 8.4 open item: copy performance regression?

From: Marko Kreen <markokr(at)gmail(dot)com>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: 8.4 open item: copy performance regression?
Date: 2009-06-19 13:59:02
Message-ID: e51f66da0906190659k36bf08d1u225a83276299b470@mail.gmail.com
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On 6/19/09, Andrew Dunstan <andrew(at)dunslane(dot)net> wrote:
> Kevin Grittner wrote:
> > 8.3.7
> > real 0m24.249s
> > real 0m24.054s
> > real 0m24.361s
> > 8.4rc1
> > real 0m33.503s
> > real 0m34.198s
> > real 0m33.931s
>
> Ugh. This looks like a poster child case for a benchfarm ...
>
> Is there any chance you guys could triangulate this a bit? Good initial
> triangulation points might be the end of each commitfest. (I have a vested
> interest in making sure COPY performance doesn't regress, since it will
> affect parallel restore's speed in spades.)

git bisect?

--
marko

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