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Re: 'best practises' to speed up sorting? tuning postgresql.conf - Mailing list pgsql-performance

From Shridhar Daithankar
Subject Re: 'best practises' to speed up sorting? tuning postgresql.conf
Date
Msg-id 200306281707.52317.shridhar_daithankar@nospam.persistent.co.in
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In response to 'best practises' to speed up sorting? tuning postgresql.conf  ("Chris Hutchinson" <chris@hutchinsonsoftware.com>)
List pgsql-performance
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On Saturday 28 June 2003 17:01, Chris Hutchinson wrote:
> I'm wondering how to speed up sorting which is slowing a query run
> regularly on a linux postgresql 7.3.3 system.
>
> The box is a dual PIII with 1Gb ram. The database is located on a 20Gb SCSI
> disk, with WAL on a separate disk.
>
> The only changes I've made to postgresql.conf so far are:
> shared_buffers=4000
> sort_mem=4000

sort_mem is in kbs. So you are setting it roughyl 4MB. Given that you don't
seem to have any shortage of RAM, how about 32/64/128MB RAM till things work
as expected?

Of course, setting it so in postgresql.conf would be a bad idea. Just set for
the session that makes this query and reset it back.

Keep us posted on updates..

 Shridhar

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