Date: Wed, 08 Aug 2007 15:32:50 +0200
From: jurgen_mortier@amis.com
Subject: History on dynamic parameters
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Reply-to: jurgen_mortier@amis.com

Hi,

I'm a junior DBA and I have an Oracle 9.2.0.4.0 running on Solaris 8 which
has been restarted on July 28th (by my collegue currently on FTO) to change
some parameters:
- shared_pool_reserved_size= from 60M to 100 M
- shared_pool_size= from 600M to 1000M
- undo_retention= from 1800 to 3600

Since then users report that queries are running twice as long as before.

On August 2nd I tried to change back the last 2 parameters (since they were
dynamic), but the CKPT process was consuming 1 complete CPU and I was
forced to reboot the system on the 3rd. At that time I changed the
parameters back to 600M and 1800 seconds.

Since that didn't improve the response time, I started realizing that other
dynamic parameters might have been changed dynamically without the init
file being updated.

Does anyone know of a way to find back the history of those (dynamic)
parameters (accross DB restarts) ?

Regards
Jürgen Mortier

AMI Semiconductor - "Silicon Solutions for the Real World"
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