Here is something odd .. I have just installed Tomcat 5.0.18 so that it does not use 
IIS/JK2 like our 5.0.16 install. 

I have deployed our webapp on it. The profiling between the 2 is totally different.

On the 5.0.16 profile just 2 requests to the webapp made the heap profile have a scale 
of 100-200MB being used. Now on 5.0.18 it is 10-30MB. 

Also, all the dynamic graphs showing heap use, object use ad GC are all really active 
and spiky whereas the 5.0.16 version was very linear and GC never seemed to happen.

I'm no expert in this stuff but something has changed bigtime with this 5.0.18 
install. They both use the same JVM too.



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