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Oh Where Oh Where Is My Redo Coming From

From: Post, Ethan <Ethan.Post_at_ps.net>
Date: Fri, 21 Feb 2003 07:44:19 -0800
Message-ID: <F001.00554647.20030221074419@fatcity.com>


Just had a thought here, have not tried it yet. I have a database that I am working with that is generating 28 GB of redo each day. I would really like to know what objects are generating all this redo without going through the hassle of mining a bunch of log files. It occurred to me that if table monitoring is active and my stats are up to date I should be able to multiply the total number of updates, inserts and commits by the average row size and get a rough % of what objects are generating the most redo.

I am sure there are a number of other factors I need to consider, any ideas what they are?

The goal is to identify the objects, then identify the jobs that work on those objects and see if I can reduce redo. I suspect a lot of this redo is being generated because of some poor design issues.

Thanks!

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