Re: 8.4 open item: copy performance regression?

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>
Cc: 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 13:53:36
Message-ID: 4A3B9860.5030704@dunslane.net
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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.)

cheers

andrew

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