| 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 |
| Views: | Whole Thread | Raw Message | Download mbox | Resend email |
| 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
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Jay | 2004-08-04 02:28:45 | trouble with query |
| Previous Message | Scott Marlowe | 2004-08-04 00:25:57 | Re: trash talk |
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Martin Foster | 2004-08-04 03:49:11 | Re: Performance Bottleneck |
| Previous Message | Joshua D. Drake | 2004-08-03 18:52:28 | Re: Performance Bottleneck |