RE: The responsible

This is why I always set the parameters generic in test and force them to reprove their need, before including them in the upgrade.

Mike

>From: Juan Carlos Reyes Pacheco <juancarlosreyesp_at_gmail.com>
>Reply-To: juancarlosreyesp_at_gmail.com
>To: oracle-l_at_freelists.org, jonathan_at_jlcomp.demon.co.uk
>Subject: The responsible
>Date: Tue, 7 Feb 2006 12:46:54 -0400
>
>HI I want to share this info, not asking.
>
>Some years ago I changed the optimizer parameters, and this solved a query,
>from minutes to seconds
>OPTIMIZER_INDEX_COST_ADJ = 10
>OPTIMIZER_INDEX_CACHING = 90
>Now the situation reversed, and I had to comment them
>To move a process from 4 minutes to 7 seconds.
>
>using optimizer parameters 10,90
>trace file 870 M
>time 4 minutes (without trace)
>recursive 465.43 s
>non recursive 233.21 s
>
>
>commenting optimizer parameters and leaving with their defaults
>Trace file 6 M
>time 7 seconds
>recursive 5.87 s
>non recursive 1.79 s
>
>
>
>
>
>
>--
>Oracle Certified Profesional 9i 10g
>Orace Certified Professional Developer 6i
>
>8 years of experience in Oracle 7,8i,9i,10g and developer 6i

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