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help / color / mirror / Atom feedFrom: Rod Taylor <pg@rbt.ca>
To: Bill <bill@math.uchicago.edu>
Cc: Postgresql Performance <pgsql-performance@postgresql.org>
Subject: Re: Query performance
Date: Wed, 30 Jun 2004 10:27:25 -0400
Message-ID: <1088605644.12340.10.camel@jester> (raw)
In-Reply-To: <200406301346.i5UDktfL013134@math.uchicago.edu>
References: <200406301346.i5UDktfL013134@math.uchicago.edu>
> Can I get any better performance?
You can try bumping your sort memory way up (for this query only).
Another method would be to cluster the table by the symbol column
(eliminates the expensive sort).
If you could run a very simple calculation against open & close numbers
to eliminate a majority of symbols early, that would be useful as well.
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To: pgsql-performance@postgresql.org
Cc: pg@rbt.ca, bill@math.uchicago.edu
Subject: Re: Query performance
In-Reply-To: <1088605644.12340.10.camel@jester>
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