A simple “Hello World” needs 10G virtual memory on a 64-bit machine vs 1G at 32-bit?

Question

Running a simple Java program on our production machine, I noticed that this program eats up more 10G virt. I know that virtual memory is not that relevant, but at least I would

Answer 1

Your program is NOT using so much memory. JVM / OS is reserving that memory i.e, the limit UPTO WHICH your program can use. Also, like one of the answer clearly mentions. 32 bit and 64 bit have got nothing to do with this. 32 bit means you can access upto 2^32 physical memory locations. and 64 bit means upto 2^64.