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Exchange Defrag

Medium Priority
Last Modified: 2012-05-11

I've been having problems with a clients exchange database doubling in it's size. Originally the size was sitting at about 30-40gb, then one day it just exploded and doubled in size, and this is not due to mail in users mailboxes. With total user mailbox data the Exchange database should actually be between 30-40gb. We've tried defragging the database twice now, the first time we ran the defrag, the size cut about in half from 60gb to 30-35gb. About 3 weeks later the size doubled again to about 60-70gb. After running the defrag again, the size jumped to 90gb+! Can anyone elaborate or help here?
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Do a database integrity check using isinteg tool after defrag.

Make sure that any file level AV is not set to scan the exchange directories / files (especially not EDB + STM + log + chk)

Then check the application event log on the exchange server and make sure it is registering event ID 1221 every day for your databases.
The DB is growing about 5MB every other second so soon I will run out of disk space. What could be causing this since the mailboxes are not increasing in size?

File level Anti Virus scanning things it us not supposed to like exchange log files can cause growth like that, so check your file level AV exclusions list.
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What version of Exchange is this?

Generally issues to look into that can cause excessive log generation and database growth are;

1. Data importation, i.e. have you done any imports lately

2. Mailbox Moves and in some cases stuck/looping pending moves

3. Automated mailings, i.e. if you have someone sending out large mail blast

4. Spam

5. 3rd party integration, i.e. if you are using a CRM system with an outlook plugin it can cause issues.  I know there was an issue with MS CRM Dynamics that caused this in the past

6. Devices gone wild like BES servers but more recently there has been a rash of incidents regarding  iPhones etc http://msexchangeteam.com/archive/2010/06/30/455342.aspx

If you want to see if the problem is coming from an internal Device/Machine you can use one of the following

MS USER MONITOR: http://www.microsoft.com/downloads/en/details.aspx?FamilyId=9A49C22E-E0C7-4B7C-ACEF-729D48AF7BC9&displaylang=en and here is a link on how to use it http://www.msexchange.org/tutorials/Microsoft-Exchange-Server-User-Monitor.html

And of course this is a good one as well http://blogs.msdn.com/b/scottos/archive/2007/07/12/rough-and-tough-guide-to-identifying-patterns-in-ese-transaction-log-files.aspx

Any update?
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