Definitely after.
Jonathan
-----Original Message-----
From: pgsql-performance-owner@postgresql.org
[mailto:pgsql-performance-owner@postgresql.org] On Behalf Of Matthew
Wakeling
Sent: Monday, November 23, 2009 1:00 PM
To: Jonathan Blitz
Cc: pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Why is the query not using the index for sorting?
On Sun, 22 Nov 2009, Jonathan Blitz wrote:
> I have a table with a number of columns.
>
> I perform
>
> Select *
> from table
> order by a,b
>
> There is an index on a,b which is clustered (as well as indexes on a and b
alone).
> I have issued the cluster and anyalze commands.
Did you analyse *after* creating the index and clustering, or before?
Matthew
--
[About NP-completeness] These are the problems that make efficient use of
the Fairy Godmother. -- Computer Science Lecturer
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