Re: Poor Performance on a table

On Thu, 02 Dec 2004 14:32:53 -0500
Pallav Kalva <pkalva(at)deg(dot)cc> wrote:

> Hi Frank,
>
> Thanks! for the quick reply, here are my current default fsm
> setting .
> max_fsm_pages = 20000 and max_fsm_relations = 1000
> What are the appropriates settings for these parameters ? are there
>
> any guidlines ? postgres docs doesnt give much information on setting
> these values.

There really aren't any guidelines on these because it really depends
on your data and how you use the database. If you insert/update 99%
of the time and only delete 1% of the time, the defaults are probably
perfect for you. Probably up to a 80% insert/update, 20% delete
ratio.

If however you're constantly deleting entries from your database, I
would suggest slowly raising those values in step with each other
over the course a few weeks and see where you're at. It is really
a matter of trial an error.

With my databases, I can afford to do VACUUM FULLs fairly often
so I typically don't need to increase my fsm values.

---------------------------------
Frank Wiles <frank(at)wiles(dot)org>
http://www.wiles.org
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