Date: Thu, 29 Aug 2013 13:00:22 +0200
From: hubert depesz lubaczewski <depesz@depesz.com>
To: fburgess@radiantblue.com
Cc: pgsql-performance@postgresql.org
Subject: Re: Poor OFFSET performance in PostgreSQL 9.1.6
Message-ID: <20130829110022.GA27417@depesz.com>
Reply-To: depesz@depesz.com
References: 
 <20130828133946.5a830134ae84016b0174832fdc1a3173.53df957760.wbe@email11.secureserver.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: 
 <20130828133946.5a830134ae84016b0174832fdc1a3173.53df957760.wbe@email11.secureserver.net>
User-Agent: Mutt/1.5.21 (2010-09-15)
Precedence: bulk
Sender: pgsql-performance-owner@postgresql.org

On Wed, Aug 28, 2013 at 01:39:46PM -0700, fburgess@radiantblue.com wrote:
>    Can anyone offer suggestions on how I can optimize a query that contains the LIMIT OFFSET clause?
>    The explain plan of the query is included in the notepad attachment.
>    thanks

large offsets are slow, and there is no real escape from it.

You can change your paging solution, though, to something that will be
faster.

Possible solutions/optimizations:

http://www.depesz.com/2007/08/29/better-results-paging-in-postgresql-82/

or

http://www.depesz.com/2011/05/20/pagination-with-fixed-order/

Best regards,

depesz


-- 
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance