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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
Date: Thu, 29 Aug 2013 13:00:22 +0200
Message-ID: <20130829110022.GA27417@depesz.com> (raw)
In-Reply-To: <20130828133946.5a830134ae84016b0174832fdc1a3173.53df957760.wbe@email11.secureserver.net>
References: <20130828133946.5a830134ae84016b0174832fdc1a3173.53df957760.wbe@email11.secureserver.net>
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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



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