Number of Parallel GC Threads

kirk kirk at
Fri Jan 23 22:52:32 UTC 2009

Clemens Eisserer wrote:
>> I should add that I think that the bigger problem is that GC doesn't play nice
>> when you have many VMs running on the same hardware.
>> (point taken about partitioning and all that).
>> Some how it has to figure out if it has free reign or if it need to share.
> In theory there are slowdowns when three or more JVMs run their GC at
> exactly the same time, but how often does that happen.
> Do you have any evidence that this is a problem in real-world useage?
> - Clemens
Yes, I do have customers where the only way to solve the problem was to 
"de-tune" gc threads. Sorry NDA prevents me from saying a lot more 
though I can talk in generalities.


More information about the hotspot-gc-dev mailing list