Re: Tunning PostgreSQL performance for views on Windows

In response to Ranieri Mazili <ranieri(dot)oliveira(at)terra(dot)com(dot)br>:
>
> I'm developing a BI and as database it's using postgresql 8.2, how data
> are very detailed, I'm creating a view to consolidate the most important
> data, but the performance of view is very poor, 1 minute to perform more
> or less without where clause.
> I need to know how I can increase the performance, if exist some option
> to do cache, because the view will change only one time per day.
> My configuration is default, without modifications after install.
> I'm using windows 2003 server with a dell server with 4GB of memory.

Standard tuning advice would apply, as well as the advice not to cross-
post. Also boilerplate advice that we can't really help much without
more detail.

Good places to start with tuning:
http://www.powerpostgresql.com/PerfList
http://www.varlena.com/GeneralBits/Tidbits/perf.html

However, if the data only changes once a day, you may be better of
materializing the data, instead of using a view. Run a cron job
once a day that does your big query and stores the data in another
table vi SELECT INTO might be better for you than a view.

> To create the view, I created some functions, and then perform they on
> one select like:
> select A.field1, B.field2, ... from function_A() A, function_B() B...
> Is this the best way to do it?
>
> I appreciate any help.
>
> Thanks
>
>
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Bill Moran
http://www.potentialtech.com