websphere apps server causing as400 to crash

[swish2408]

We are running multiple Appservers on the one AS400, Problem is that each time a large report it generated each Appserver is taking up 40% or so of the cpu, a few of these at a time and down goes the AS400. Any tips on how to limit the apps servers to a certain cpu percentage or how to keep them under control would be great......

thanks heaps

 

[fearo]

Hi,

What is the Max JVM size have you specified for the Application Server? You say that there are multiple AppServers is this a Cloned environment?

Set the JVM to -ms256m -mx256m and turn on -verbosegc. Then you can use a tool called GCStats to graphically represents what is going on.

Also get you hands on the "IBM WebSphere Application Server Standard / Advanced Edition Tuning Guide" which I think comes as part of the Infocenter. It details different approaches to Performance Tuning.

Regards,

Fearo