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Optimize slow query

From: "Tyler Durden" <tylersticky(at)gmail(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Optimize slow query
Date: 2007-06-13 11:41:27
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Lists: pgsql-performance
I've a table with 300 000 records and I'm trying to do a search:

SELECT * FROM addresses WHERE address ILIKE '%Jean Paul%' AND
(l_pc='4250' or r_pc='4250') AND (l_struc='O' or r_struc='O') AND
(prenm ILIKE 'Street')

It performs in 2 seconds in a dual Xeon 2.4mhz with 2Gb of RAM.
I'm using Postgresql 8.1 on ubuntu.
I've indexes on l_pc, r_pc, l_struc,r_struc and prenm (all btrees)
What I'm doing wrong to have such a slow query?

Nuno Mariz


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