| From: | Craig Ringer <ringerc(at)ringerc(dot)id(dot)au> |
|---|---|
| To: | Samuel Gendler <sgendler(at)ideasculptor(dot)com>, "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: [PERFORM] The need for clustered indexes to boost TPC-V performance |
| Date: | 2012-07-06 03:02:34 |
| Message-ID: | 4FF6554A.2040303@ringerc.id.au |
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| Lists: | pgsql-general pgsql-performance |
On 07/06/2012 09:33 AM, Samuel Gendler wrote:
>
> Some other potential issues - with only 10MB of work_mem, you might be
> gong to temp space on disk more than you realize. Explain analyze
> might reveal that, but only if you happen to pick a query that exceeds
> work_mem on at least one step.
Rather than hunting blindly with EXPLAIN ANALYZE it's better to just
turn log_temp_files on and see what's reported.
--
Craig Ringer
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