From: Andres Freund <andres@anarazel.de>
To: pgsql-performance@postgresql.org
Cc: Cezariusz Marek <cezariusz.marek@comarch.pl>
Subject: Re: Slow cursor
Date: Wed, 26 Oct 2011 15:10:46 +0200
Message-ID: <201110261510.46828.andres@anarazel.de> (raw)
In-Reply-To: <DAC90718796346E5B308482692F95367@co382.comarch.net>
References: <DAC90718796346E5B308482692F95367@co382.comarch.net>
Hi,
On Wednesday 26 Oct 2011 14:43:08 Cezariusz Marek wrote:
> Is there any known problem with slow cursors in PostgreSQL 8.4.5?
>
> I have a following query, which is slow (on my database it takes 11 seconds
> to execute), probably should be rewritten, but it doesn't matter here. The
> problem is, that in cursor, each fetch takes much longer (even few
> minutes!), while only the first one should be slow. Am I doing something
> wrong?
Does the problem persist if you play around with cursor_tuple_fraction?
Andres
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To: pgsql-performance@postgresql.org
Cc: andres@anarazel.de, cezariusz.marek@comarch.pl
Subject: Re: Slow cursor
In-Reply-To: <201110261510.46828.andres@anarazel.de>
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