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I am having a problem with my JVM
It will all of a sudden jump to 50% CPU usage and then to 100%
Then strange things start happening.
I am running on NT4 SP6a. Jserv 1.1.1, Apache 1.3.12 SUN - JDK1.1.8
on a dual P II 450 mhz with 256 ram.
My Prop file is running java -ms32m -mx64m -verbosegc
I have found nothing in the Apache or Jserv logs to correlate
to these CPU jumps. I had a look at the GC info and
I am finding the following excerpt spread through my error.log:
>My understanding of this is that it has topped at 26.843m and has
>to free up heap. Why? if I have -mx64m set?
Garbage Collection is to remove dereferenced objects from the JVM
stack(memory), the JVM schedules sweeps periodically to maintain free
memory(resources). It doesnt wait until it is totally out of memory before
doing a gc sweep, that wouldnt be too smart as the wait to free up resources
would impact the user of the application the JVM is running. You can
influence when the sweeps occur as the JVM watches out for when it is
running out of resources and will hurriedly insert a sweep. That was the
gist of the IBM article.
Cameron Riley
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