[Swift-devel] Java memory strangeness

[Justin M Wozniak]

Is this a 32-bit machine?

On 07/02/2012 04:49 PM, David Kelly wrote:
> Hello,
>
> I installed Sun Java on a new machine I am working on. When I try to run it I see this:
>
> -bash-3.2$ java -version
> Error occurred during initialization of VM
> Could not reserve enough space for object heap
> Error: Could not create the Java Virtual Machine.
> Error: A fatal exception has occurred. Program will exit.
>
> The machine has 27G of memory free.
>
> When I specify a value of -Xmx it seems to work fine until I get somewhere around between 4 and 8 gigs. From what I've read, the default heap size is 1/4th of the total memory up to 1 gig, so I have no idea why it's failing here.
>
> I can run Swift manually from this machine because the swift shell script explicitly sets the heap size.
>
> But, I run into problems when I use ssh:pbs to the machine.
>
> How is the heap size determined when using ssh/coasters/bootstrapping? I've tried setting SWIFT_MAX_HEAP and COG_OPTS in my bashrc but that didn't seem to help. I might be able to get around this by creating some kind of java wrapper that explicitly sets heap size.. just curious how it currently gets set in this situation.
>
> Thanks,
> David
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-- 
Justin M Wozniak