Carefully consider extending the retention on the Summary table, as the amount 
of data can be large, taxing your database.  What I prefer to do is keep a 
smallish Summary table, given that the need to query old data is rare, where I 
keep 30 days of Activity Log data in the database and older days as text files 
stored in HSM, which I can grep or analyze for historic information.  The TSM 
accounting records are a further good source of historic statistical info on 
client sessions.

     Richard Sims    still plugging away at Boston University