JVM memory allocation

[satyendra adhikari]

Is it possible to specify max memory for a JVM more that the available system memory.

Say, I have a machine with 1 GB RAM and I want to run a JVM with max memory setting set to 2GB .
Will it work for an application that needs 2GB memory, any explanation or more information will be much appreciated.

Thank you!!

[Paul Clapham]

If your system supports virtual memory, then theoretically you could do that. You might find your application runs slowly or erratically because of the paging involved, though.

[satyendra adhikari]

Ok, thanks!

so what happens is OS dependent, if the OS can not allow it additional memory (by working around virtual memory in such cases), will it throw out of memory error?

[Chandramouli Jambunathan]

Hi,

Increase JVM heap size to avoid Out of memory problem..