Your best bet is probably EXPLAIN ANALYZE. This should give you a better idea of where the inefficiencies are in your queries. The only way to make it more accurate is, as far as I know, increasing the number of rows postgresql samples from each table during the vacuum.

Stefano

---------------------------------
Stefano Buliani
Covestor
email: [EMAIL PROTECTED]
mobile: +44 (0) 7766295328

This message is intended solely for the recipient(s) to whom it is addressed. If you are not the intended recipient, you should not disclose, distribute or copy this email. Please notify the sender immediately and delete this email from your system. ----- Original Message ----- From: "Judith Altamirano" <[EMAIL PROTECTED]>
To: <pgsql-sql@postgresql.org>
Sent: Tuesday, October 14, 2008 11:34 PM
Subject: [SQL] effectiveness tool


Hello everybody!!

I just want to know if there be some tool to analize the performance of a query, I mean to qualify the effectiveness, speed, if I have the correct indexes.

  Hope somebody can help me....

 Thanks in advanced!!

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