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Re: Very specialised query

From: "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
To: "Matthew Wakeling" <matthew(at)flymine(dot)org>,<pgsql-performance(at)postgresql(dot)org>
Subject: Re: Very specialised query
Date: 2009-03-26 14:47:33
Message-ID: 49CB4F35.EE98.0025.0@wicourts.gov (view raw or flat)
Thread:
Lists: pgsql-performance
Matthew Wakeling <matthew(at)flymine(dot)org> wrote: 
> any other tips?
 
I would try adding an index on (objectid, start) and another on
(objectid, end) and see how that first query does.  Also, if id is a
unique identifier, I'd recommend a unique constraint or (better) a
primary key definition.  Check the system tables to see whether all
the existing indexes are actually being used -- if not, drop them.
 
-Kevin

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