From: | Justin Clift <justin(at)postgresql(dot)org> |
---|---|
To: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
Cc: | Matthew Kirkwood <matthew(at)hairy(dot)beasts(dot)org>, pgsql-general(at)postgresql(dot)org |
Subject: | Re: Performance Tuning Document? |
Date: | 2002-04-18 02:43:23 |
Message-ID: | 3CBE32CB.EF034972@postgresql.org |
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Lists: | pgsql-general |
Bruce Momjian wrote:
>
<snip>
>
> I have added this to my performance paper:
>
> As a start for tuning, use 25% of ram for cache size, and 2-4% for sort
> size. Increase if no swapping, and decrease to prevent swapping. Of
> course, if the frequently accessed tables already fit in the cache,
> continuing to increase the cache size no longer dramatically improves
> performance.
That's pretty cool.
Reckon you should add in a good and clear example for people though,
just to make it 100% clear in their heads.
:-)
Regards and best wishes,
Justin Clift
> --
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