From: Stefan Kaltenbrunner <stefan@kaltenbrunner.cc>
To: sgunderson@bigfoot.com
Cc: pgsql-performance@postgresql.org
Subject: Re: Performance of ORDER BY
Date: Tue, 05 Dec 2006 20:55:40 +0100
Message-ID: <4575CEBC.9030202@kaltenbrunner.cc> (raw)
In-Reply-To: <20061205181733.GA10309@uio.no>
References: <4575A863.6040504@varianinc.com>
<7090.1165341726@sss.pgh.pa.us>
<20061205181733.GA10309@uio.no>
Steinar H. Gunderson wrote:
> On Tue, Dec 05, 2006 at 01:02:06PM -0500, Tom Lane wrote:
>> In 8.0 that might be counterproductively high --- we have seen cases
>> where more sort_mem = slower with the older sorting code. I concur
>> with Luke's advice that you should update to 8.2 (not 8.1) to get the
>> improved sorting code.
>
> By the way, is the new sorting code any better for platforms that already
> have a decent qsort() (like Linux)?
yes - especially on-disk sorts will get some tremendous speedups in 8.2.
Stefan
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To: pgsql-performance@postgresql.org
Cc: stefan@kaltenbrunner.cc, sgunderson@bigfoot.com
Subject: Re: Performance of ORDER BY
In-Reply-To: <4575CEBC.9030202@kaltenbrunner.cc>
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