| From: | Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au> |
|---|---|
| To: | Merlin Moncure <merlin(dot)moncure(at)rcsonline(dot)com> |
| Cc: | Marius Andreiana <mandreiana(at)rdslink(dot)ro>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: NOT IN query takes forever |
| Date: | 2004-08-04 01:32:53 |
| Message-ID: | 41103CC5.7030207@familyhealth.com.au |
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| Thread: | |
| Lists: | pgsql-general pgsql-performance |
> explain analyze actually runs the query to do timings. Just run explain
> and see what you come up with. More than likely there is a nestloop in
> there which is causing the long query time.
>
> Try bumping up shared buffers some and sort mem as much as you safely
> can.
Just use an EXISTS query I suggest.
Chris
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