Java threads on multiple processor cores

[Jurij Kovacic, OCPEA d.o.o.]

Hello!

On 02/25/2013 09:10 AM, Achilleas Mantzios wrote:
> Zdravo,
>
> How are you sure your jboss does not utilize more than 1 processor?
> did you check with top and then by enabling the thread view with "H"?
> Have you tried the same with jboss run on the native installation?
(I was pleasantly surprised by your greeting - do you speak Slovenian by 
any chance?)

I have tried the tings you suggested - top shows approx. 50% usage on a 
dual processor machine and 25% on quad core.

What seems to happen is that the aplication triggers full GC, which 
(seems?) to run on only one thread. My JVM settings pertaining to GC are 
the following:
"... -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -verbose:gc 
-XX:+PrintGCDetails". Is there a way to make full GC run on multiple 
threads (and so, presumably on multiple processors)?

  Thank you very much for your reply!

Kind regards,
Jurij