DGC and UseParallelOldGC

[Jon Masamitsu]

Rainer Jung wrote On 10/13/09 15:46,:

>Hi all,
>
>if I activate the parallel stop the world collector using
>-XX:+UseParallelOldGC and DGC kicks in: will it run with multiple
>threads in parallel, or will it only run single-threaded?
>  
>

I'm assuming you mean that you are using the throughput collector
(UseParallelGC/UseParallelOldGC) in which case turning on
UseParallelOldGC will use multiple threads for an explicit GC.
(System.gc()).

>I know that in case I use CMS, there are ExplicitGCInvokesConcurrent and
>ExplicitGCInvokesConcurrentAndUnloadsClasses which also influence DGC,
>but I didn't find any info about the situation using parallel old GC.
>
>TIA!
>
>Regards,
>
>Rainer
>
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>  
>

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