[Swift-devel] Java memory strangeness

[David Kelly]

bash-3.2$ uname -a
Linux makena.uchicago.edu 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

Seems to be 64 bit

----- Original Message -----
> From: "Justin M Wozniak" <wozniak at mcs.anl.gov>
> To: "David Kelly" <davidk at ci.uchicago.edu>
> Cc: "swift-devel Devel" <swift-devel at ci.uchicago.edu>
> Sent: Monday, July 2, 2012 4:56:17 PM
> Subject: Re: [Swift-devel] Java memory strangeness
> 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
> > _______________________________________________
> > Swift-devel mailing list
> > Swift-devel at ci.uchicago.edu
> > https://lists.ci.uchicago.edu/cgi-bin/mailman/listinfo/swift-devel
> 
> 
> --
> Justin M Wozniak