RFR: 8200228: Change default value of HeapSizePerGCThread

Stefan Johansson stefan.johansson at oracle.com
Tue Apr 10 11:43:54 UTC 2018


CSR is now approved. Do I need a second reviewer for this default value 
change?

Stefan

On 2018-03-29 10:52, Stefan Johansson wrote:
> 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
>>
> 


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