We have 1 main BlackBerry server with 2 Xeon 3.2Ghz processor and 3GB RAM supporting 450 users. When we ran 4.0 SP1/Hotfix3 the server would average a CPU utilization of 10%. After we upgraded to 4.0 SP2/Hotfix2 we are average 80% CPU utilization.
The odd thing I'm not having any issue with the Alert log. The Alert logs looks like it got smaller since the upgrade.