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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Scott Marlowe <scott.marlowe@gmail.com>
Cc: Greg Smith <greg@2ndquadrant.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: : Performance Improvement Strategy
Date: Wed, 05 Oct 2011 14:15:54 -0400
Message-ID: <23412.1317838554@sss.pgh.pa.us> (raw)
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Scott Marlowe <scott.marlowe@gmail.com> writes:
> It used to be that cluster on a very randomly ordered table was much
> slower than doing something like select * into newtable from oldtable
> order by col1, col2;  Is that still the case in 9.0/9.1?

Fixed in 9.1, per release notes:

	* Allow CLUSTER to sort the table rather than scanning the index when it seems likely to be cheaper (Leonardo Francalanci)

			regards, tom lane



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