What is the point of this product?
I'm struggling to see it - other than solve a problem that existed a good few years ago. With either a modern JVM or a decent design you would never need this app.
For example -> (Use Gencon gc!) http://www.nearinfinity.com/blogs/aaron_mccurry/tuning_the_ibm_jvm_for_large_h.html
quote --> " finally settled on 100G heap with 50% a nursery, and the full GCs are now in the 400-600ms range. I can live with that, because this gives us a huge ceiling for load, and capacity."
This was two years ago... Will have been some performance improvement from there.
If you are doing something daft on your 'social networking' website or whatever the proposed use cases are and caching vast amounts of data or using humongous session objects then I'd suggest using a java key-value pair object grid or some such.
or an appliance that manages a 160Gb cache per box ->
... As you may have guessed I'm an IBM drone so only able to propose solutions using our products but I'm sure any quick google will provide a myriad of free open source options. (like memcached, not java but plenty of clients)