| From: | Richard Huxton <dev(at)archonet(dot)com> |
|---|---|
| To: | Aaron Bono <postgresql(at)aranya(dot)com> |
| Cc: | PostgreSQL SQL List <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: Query Join Performance |
| Date: | 2007-04-25 17:59:48 |
| Message-ID: | 462F9714.8090802@archonet.com |
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| Lists: | pgsql-sql |
Aaron Bono wrote:
> Performance tanks with this query - it takes over 120 seconds (that is
> where
> I set the timeout).
> BTW, on our Linux box the full query we run (which adds 3 more tables on
> the
> whole operation along with more filtering on the zip table) finishes in
> under 10 seconds. Problem is our development is on Windows and this is a
> real pain for developers to test.
So what's different between the systems. Obvious things to look at:
1. EXPLAIN ANALYSE outputs to show the plans (these presumably are
different, but in what details, and why?)
2. Configuration (particularly memory/cost settings).
3. Hardware.
4. Locale/encoding - these can affect index usage and sorting.
--
Richard Huxton
Archonet Ltd
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