Hi Mike,
have you had some cartridge mounts in this time ?
We had a weekend on which ADSM tried to get a cartridge, that ended 
with an error and adsm tried it again later. In this time adsm asked 
the OS every x mSecond if the cartridge is mounted and this results in 
very high CPU usage !
IBM delivers a short zap to encreases the interval time for adsm to 
ask the system.
If you need the zap I'll try to find it.
Best wishes
Armin Eickhoff
Dresdner Bank AG
Konzernstab Organisation                -email: Armin.Eickhoff AT Dresdner-Bank 
DOT de
Großrechner- und Speichersysteme      (       (+49) 69 263 - 7525
Wm 14 / 2F                      Fax:    (+49) 69 263 - 19243
D-60301 Frankfurt am Main               Visit:  http://www.dresdner-bank.de