> What is your container config? Can you post your descriptor (ejb-jar.xml,
> jboss.xml and jbosscmp-jdbc.xml)? I want to see what fields you're eager
> loading as well as what you're caching, marking read only (to prevent
> transaction locking) and what locking policies you're using (if collisions
> are rare then do you need pessimistic locking?)
We are using BMP. So I guess, there isn't a lot with respect to locking that can be
tuned.
> Right, that=B9s totally not a fair comparison. How does JBoss do
> on the IBM
> JDK? Which JDK version?
As I said - we haven't tried that yet. But we should and will.
> Do you have multiple processors?
Yes.
> Can you use the low-pause garbage
> collection? The default garbage collector is single threaded and
> stops all
> threads (essentially) and thus performs suboptimal on multi-processor
> systems. That you have excessive garbage collection especially makes me
> wonder how you're making use of transactional and second-level cache.
> (We'll talk about all of this in great detail in the august training and
> less in the august jug talk)
The person in charge of the JBoss installation actually has done substantial tests
with gc parameters. I believe we do not use the stop-the-world collector.
> IBM shouldn't ask Sun to open source their JDK, IBM should open source
> theirs. ;-)
True.
-hendrik
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