Howdy,

>>>My tomcat 4.1.29 instance running J2RE 1.4.1 IBM build
>>>cxia321411-20030930 on RedHat 9 kernel 2.4.18-14
>>>keeps gaining processor usage until finally can't answer requests
>>>successfully.

OK, so you can't profile.  I'm not sure a thread dump would be that
useful in this scenario because it might be a repeating operation, e.g.
on a growing collection.

Do you maybe have a class that keeps searching through a collection for
some object, and that collection grows with time to the point where the
search consumes a lot of CPU?

Or perhaps garbage collection is the culprit?  If you can restart your
JVM, add -verbose:gc to the java VM options, so you can see if the CPU
time is spent collecting garbage is monotonically increasing to the
point of thrashing (repeating full GC collections that don't reclaim any
significant heap space).

Yoav Shapira



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