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jalf
Asked: 2011-03-23 05:13:00 +0800 CST

Does Exchange generate transaction logs even for read-only operations?

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I've inherited some code which uses Exchange Web Services to synchronize data between an Exchange server and our system.

I'm currently trying to troubleshoot a problem where the code generates a huge amount of transaction log data (200GB over a couple of days).

Now, I'm pretty new to Exchange, but one thing I've noticed, which surprises me, is that some 20MB of transaction log files are generated even when I run our program in read-only mode (so it calls GetItem, FindItem, GetFolder and FindFolder, but create/update/delete calls are stubbed out.)

How come? what does Exchange need transaction logs for when reading data?

exchange-2007 exchange

2 Answers

  1. Best Answer

    Those ops are not pure read only. They do incur database writes in the form of last-read attribute updates, and a variety of other things like mailbox-last-accessed-by. They're write-light, not read-only as far as the database is concerned.

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  2. You should inspect your diagnostic logging, you might have some/all settings set on verbose level.

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