| From: | "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com> |
|---|---|
| To: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Air-traffic benchmark |
| Date: | 2010-01-07 14:02:44 |
| Message-ID: | 20100107140244.GD9884@a-kretschmer.de |
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| Lists: | pgsql-performance |
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
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Andreas Kretschmer
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