Last update: 12/2/2011If while running JDeveloper in 220.127.116.11.0 in 64 bits, you get
My Computer--> Properties --> Advanced --> Settings --> Advanced --> (Virtual Memory) Change --> Virtual Memory
I used 1.5 of my physical RAM.
For more check TROUBLESHOOTING: Windows - Virtual Memory Minimum Too Low.
Note: In no way is this a problem of the new JDeveloper, which is actually working awesomely in 64bit, but just a tuning on your windows operating system.