L2J Server

I am using Ubuntu 10.04 64bit and I am getting a weird error whenever I start the gameserver:

Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

Whenever I set the -Xmx to 512, everything seems to start normally, however I am not satisfied with this value and would like to reserve more space. Is there any way to do this without having this pesky error?

Cheers.

yes search.php

hope wrote:yes search.php

Thanks for the offer mate, but I already did search and found nothing related to Ubuntu or Linux for that matter.

i found plenty

Not enough available memory.
If you want more then 512MB... well...
if you are on a virtual machine increase it on VM settings, if not you need some extra RAM.