Shane,

+UseNUMA only works for the parallel GC.

Tony

On 4/13/2010 12:58 PM, Shane Cox wrote:
> Is -XX:+UseNUMA specific to the parallel throughput collector
> (-XX:+UseParallelGC) or would it also help when running the CMS
> collector (-XX:+ParNewGC)?
>
> Thanks
)

On 04/13/10 09:58, Shane Cox wrote:
> Is -XX:+UseNUMA specific to the parallel throughput collector
> (-XX:+UseParallelGC) or would it also help when running the CMS
> collector (-XX:+ParNewGC)?

It hasn't yet been extended to work with anything other than
UseParallelGC's eden allocation; but there are plans on the
cards to extend it to work with other collectors in the future
as well as making the collectors numa-aware. So, no, +UseNUMA will
not provide any current benefit with CMS/ParNew.

-- ramki
)