OpenJDK and boxes with lots of RAM

[Florian Weimer]

* Jan Just Keijser:

> I would like to report an issue with OpenJDK 1.6 (and Oracle Java 6u29)
> that we have run into on our grid computing farm:

The same topic has recently been discussed on the hotstop-dev list.

> the latest&greatest worker nodes have 12 cores and 48 GB of RAM ; we
> offer a maximum 12 jobs slots on these worker nodes, in order to
> accomodate small and large jobs (users can requests 1 - 12 cores). To
> ensure that the different jobs don't interfere with each other we also
> set a VMEM limit for each job slot. The current VMEM limit is 48 / 12 =
> 4 GB RAM per job slot. Each single core job that starts has a 'ulimit
> -v' of 4,000,000 .

Hmm.  Does this mean that Hotspot should call getrlimit(RLIMIT_AS) and
limit itself to some fraction of that value if it is not unlimited?

-- 
Florian Weimer                <fweimer at bfk.de>
BFK edv-consulting GmbH       http://www.bfk.de/
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