This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
I found an interesting difference between JVM on Windows vs SunOS.
I start java with a huge amount of memory say 1GB. I wrote a method which exhausts the heap. Interestingly Windows JVM throws OutOfMemoryException as soon as it runs out of heap space. Whereas on SunOS, it takes more than 15 seconds before getting OutOfMemoryException.