From: A. Kretschmer <andreas.kretschmer@schollglas.com>
To: pgsql-performance@postgresql.org
Subject: Re: Air-traffic benchmark
Date: Thu, 7 Jan 2010 15:02:44 +0100
Message-ID: <20100107140244.GD9884@a-kretschmer.de> (raw)
In-Reply-To: <852badbc1001070547p48b47175vf87efc473e3bd41b@mail.gmail.com>
References: <852badbc1001070438j36eb10d3qa22398ffcbef405f@mail.gmail.com>
<4B45E36E.4040706@tweakers.net>
<852badbc1001070547p48b47175vf87efc473e3bd41b@mail.gmail.com>
In response to Lefteris :
> Hi Arjen,
>
> so I understand from all of you that you don't consider the use of 25k
> for sorting to be the cause of the slowdown? Probably I am missing
> something on the specific sort algorithm used by PG. My RAM does fill
> up, mainly by file buffers from linux, but postgres process remains to
> 0.1% consumption of main memory. There is no way to force sort to use
> say blocks of 128MB ? wouldn't that make a difference?
The result-table fits in that piece of memory.
You have only this little table:
[ 5, 7509643 ]
[ 1, 7478969 ]
[ 4, 7453687 ]
[ 3, 7412939 ]
[ 2, 7370368 ]
[ 7, 7095198 ]
[ 6, 6425690 ]
Andreas
--
Andreas Kretschmer
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To: pgsql-performance@postgresql.org
Cc: andreas.kretschmer@schollglas.com
Subject: Re: Air-traffic benchmark
In-Reply-To: <20100107140244.GD9884@a-kretschmer.de>
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