By default, Reporting Server keeps 7 days worth of `transaction` logs in this directory. You may also have `tracing` enabled, which will further increase log size.
Solution
1. Log into Reporting Server through the Symantec System Center.
2. Click on Admin, then choose Agent Configuration
3. Here you can edit the configuration for the various agents. The largest log entries are generates by the first two agents in the list.
4. Once you hit Edit, you can change the `Delete logs after` to a lesser amount. Please note that 1 day is the minimum! 0 days is not a valid entry.
5. Make sure that Tracing is not checked.
6. Hit Save to save your changes.
For more SAV 10 documentation visit:
http://www.symantec.com/business/support/documentation.jsp?language=english&view=manuals&pid=51852
Cheers,
Thomas