From: | Gary Stainburn <gary(dot)stainburn(at)ringways(dot)co(dot)uk> |
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To: | postgres list <pgsql-sql(at)postgresql(dot)org> |
Subject: | Re: Slow response in select |
Date: | 2010-09-21 14:20:15 |
Message-ID: | 201009211520.15903.gary.stainburn@ringways.co.uk |
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Lists: | pgsql-sql |
On Tuesday 21 September 2010 15:11:09 Craig Ringer wrote:
> On 09/21/2010 08:25 PM, Gary Stainburn wrote:
> > Hi folks,I have a view that seems to be very slow compared to similar
> > views on the same server.
> >
> > I've had a look at running explain but I don't really understand it.
> >
> > I've posted the view and the output from explain at
> >
> > http://www1.ringways.co.uk/explain.txt
>
> Woah. That's an interesting plan.
>
> When concerned about execution time, it's probably best to post EXPLAIN
> ANALYZE rather than plain EXPLAIN results. EXPLAIN ANALYZE provides more
> timing information and information about how rowcount estimates differed
> from reality.
>
> --
> Craig Ringer
I've posted th explain analyze at
http://www1.ringways.co.uk/explain_analyse.txt
I've marked a line with a sort in that appears to be the bit that's taking the
time. Am I right?
Gary
--
Gary Stainburn
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