[olug] Allocating 3GB of memory for the JVM?

Phil Brutsche phil at brutsche.us
Tue Feb 12 15:52:23 UTC 2008

Rob Townley wrote:
> Which reminds one of memory addressing in DOS - ugly. There is a
> performance hit because it has to map the ram above 4GB differently.
> However, since PAE has been in CPUs for more than a decade, it should
> not be too bad. Search through /proc/cpuinfo for pae to see if your
> CPU supports it.

I think you'll find that anything made since 1999 or so will support PAE.

However, PAE has no affect on the ability of a 32-bit process to map
more than 3GB.

To go beyond that, the OP will need a 64-bit JVM with a 64-bit OS on
64-bit hardware.


Phil Brutsche
phil at brutsche.us

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