From: pgsql-admin-owner@xxxxxxxxxxxxxx [mailto:pgsql-admin-owner@xxxxxxxxxxxxxx] On Behalf Of Warren Little
Sent: Thursday, May 18, 2006 9:06 AM
To: pgsql-admin@xxxxxxxxxxxxxx
Subject: [ADMIN] query optimization - mysql vs postgresql
my team is in the process of migrating some data from a mysql (5.0) database to our core postgres (8.1.3) database.
We are running into some performance issues with the postgres versions of the queries.
MySQL takes about 150ms to run the query where postgres is taking 2500ms.
The servers for the two database clusters are identical (dual amd 64bit dual core opteron 4GB ram scsi raid array Suse 9.x)
The table schemas have not changed (to the best of my knowledge) and the indexes were created to mimic the mysql versions as well.
I have attached one particular query along with the explain output.
Does anyone see anything in the explain that might help in diagnosing the problem.
thx
| Warren J. Little CTO Meridias Capital 1018 West Atherton Dr Salt Lake City, UT 84123 Ph 866.369.7763 |
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