From: Gary Stainburn <gary.stainburn@ringways.co.uk>
To: postgres list <pgsql-sql@postgresql.org>
Subject: Re: Slow response in select
Date: Tue, 21 Sep 2010 15:20:15 +0100
Message-ID: <201009211520.15903.gary.stainburn@ringways.co.uk> (raw)
In-Reply-To: <4C98BCFD.10202@postnewspapers.com.au>
References: <201009211325.55493.gary.stainburn@ringways.co.uk>
<4C98BCFD.10202@postnewspapers.com.au>
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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To: pgsql-sql@postgresql.org
Cc: gary.stainburn@ringways.co.uk
Subject: Re: Slow response in select
In-Reply-To: <201009211520.15903.gary.stainburn@ringways.co.uk>
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