Re: Difference between EXPLAIN ANALYZE SELECT ... total runtime and SELECT ... runtime - Mailing list pgsql-general

From A. Kretschmer
Subject Re: Difference between EXPLAIN ANALYZE SELECT ... total runtime and SELECT ... runtime
Date
Msg-id 20100723051627.GA31850@a-kretschmer.de
Whole thread Raw
In response to Difference between EXPLAIN ANALYZE SELECT ... total runtime and SELECT ... runtime  (Piotr Gasidło <quaker@barbara.eu.org>)
Responses Re: Difference between EXPLAIN ANALYZE SELECT ... total runtime and SELECT ... runtime
List pgsql-general
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
Kontakt:  Heynitz: 035242/47150,   D1: 0160/7141639 (mehr: -> Header)
GnuPG: 0x31720C99, 1006 CCB4 A326 1D42 6431  2EB0 389D 1DC2 3172 0C99

pgsql-general by date:

Previous
From: Scott Marlowe
Date:
Subject: Re: Bitmask trickiness
Next
From: Howard Rogers
Date:
Subject: Re: Bitmask trickiness