[olug] Allocating 3GB of memory for the JVM?
luke at dashjr.org
Tue Feb 12 13:25:13 UTC 2008
On Tuesday 12 February 2008, Rob Townley wrote:
> Following Sean Kelly's link. With Physical Address Extensions, a 32 bit
> OS can address 36 bits / 64GigaBytes of RAM. x86-32 with PAE.
> 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 had a problem with VMware not seeming to support it. Since
> pae/highmem=64gb was compiled into the Ubuntu server cd, the vmware guest
> would not boot. Apparently, some mobile pentiums don't support it by
> default either.
Even with PAE, I'm pretty sure processes are limited to 3 GB RAM still.
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