Re: Difference between EXPLAIN ANALYZE SELECT ... total runtime and SELECT ... runtime

From: "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: Difference between EXPLAIN ANALYZE SELECT ... total runtime and SELECT ... runtime
Date: 2010-07-23 05:16:29
Message-ID: 20100723051627.GA31850@a-kretschmer.de
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In response to Piotr Gasid??o :
> Hello,
>
> I have strange problem.
>
> I test/optimize my queries with EXPLAIN ANALYZE. I get for example:
>
> Total runtime: 40.794 ms
>
> But when I run query without EXPLAIN ANALYZE i get, for example:
>
> Time: 539.252 ms
>
> Query returns 33 rows. Why?

Maybe cheaply or virtuell hardware? There are some issues with functions
like gettimoofday(), see here:

http://archives.postgresql.org/pgsql-general/2007-01/msg01653.php
(and the whole thread)

Regards, Andreas
--
Andreas Kretschmer
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