RFR: 8200228: Change default value of HeapSizePerGCThread

[Stefan Johansson]

I've now created a CSR as well:
https://bugs.openjdk.java.net/browse/JDK-8200417

Please have a look at it and add yourself as a reviewer if everything 
looks good.

Thanks,
Stefan

On 2018-03-28 15:52, Stefan Johansson wrote:
> Hi,
>
> Please review this change of the default value for HeapSizePerGCThread.
>
> Links
> JBS: https://bugs.openjdk.java.net/browse/JDK-8200228
> Webrev: http://cr.openjdk.java.net/~sjohanss/8200228/00/
>
> Summary
> My testing shows that for DaCapo, SpecJVM98 and GCBasher (gc intensive 
> stress test) with small heaps we get better pause times with the flag 
> set to 32M. There might be other arguments, such as not using to much 
> resources on small systems that might also be important so please let 
> me know if you have reasons why the flag should be left unchanged.
>
> Thanks,
> Stefan
>