Websphere tuning

[Paresh Sharma]

Hi All,
I am using Websphere 3.5/Solaris 2.7 combination.
My project involves around 60 beans out of which there are about 20 entity beans. Recently , I have been observing that my application server gets restarted automatically after every 10 minutes. on analysing the process manager available on solaris, I observed that this restarting takes place whenever the cpu% shoots up to more that 50%. i am unaware about the limitations of websphere due to this, if there are any...
The number of simultaneous users is around 25.
are there any tested settings available for websphere which is applicable in this situation???
any suggestions???
Thanks in advance
Paresh