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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Oh Where Oh Where Is My Redo Coming From
Since SharePlex for Oracle and LiveReorg are dependant on redo log volumes,
transaction sizes, and things like that we have developed a free utility
that parses through the redo logs for some pre-defined amount of time, and
let's you know how many operations are on each table, average operations per
second, and peak operations per second. It should give you a really good
idea where the activity is coming from.
Send me a private email if you want me to get you set up on this, and I can send you the files, and the instructions on how to use it.
Nick
(nick.wagner_at_quest.com)
p.s. 28GB is good, but we've seen much more... around 100GB is massive, and we've seen maybe 2-3 databases up to 120GB per day.
-----Original Message-----
Sent: Friday, February 21, 2003 7:44 AM
To: Multiple recipients of list ORACLE-L
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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Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Nick Wagner
INET: Nick.Wagner_at_quest.com
Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services ---------------------------------------------------------------------To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Received on Fri Feb 21 2003 - 12:50:03 CST
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