Exchange 2010 Logging?

Hi All -

We've begun preparing for Exchange 2013 implementation and stated monitoring the current Exchange 2010 logging folders. We noticed that at times the server creates 1 or 2 log files per minute and then at other times say around 12:33AM the server kicks out 26 1MB files in second.  Thing is we can't figure out what process is running at this hour.

Our primary concern is the migration but this odd behavior is a little bothersome.  Is this a sign of something that could impede the migration?  Are they any straight forward ways to determine what server is doing at this time?  Does anyone know any tools or programs that can parse the make sense of the log files?  Thanks!

Zookeepa Exchange 2010 Log directory
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zookeepa1Asked:
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Will SzymkowskiSenior Solution ArchitectCommented:
I would take a look at the troubleshooting guide on the Exchange Server Team Blog.
TroubleShoot Rapid Growth Database Logging

Will.
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zookeepa1Author Commented:
Thanks Will -

Apologies for the delayed response.  Would you agree the above is not normal behavior?
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Will SzymkowskiSenior Solution ArchitectCommented:
It is normal for Exchange 2010 to have log files that are 1MB in size. Logs files are a maximum of 1MB in Exchange 2010 to ensure better performance with regards to log shipping to other members that require the logs i.e (DAG members).

As for the abundance of Logs at a particular hour, i am wondering if someone in your environment is sending out email to large distribution groups, or receiving email from external sources at this time. Another factor might be database maintenance. If you have deleted/moved mailboxes to different databases this also reflect in the logs as well.

I would check your Message tracking to see if anyone has been sending to large distribution groups at these times. I would also check all of your database maintenance schedules as well.

Will.
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