RFR (XXS): JDK-8059452: G1: Change the default values for G1HeapWastePercent and G1MixedGCLiveThresholdPercent

[Jesper Wilhelmsson]

Ship it!
/Jesper

Thomas Schatzl skrev 30/9/14 12:02:
> On Tue, 2014-09-30 at 10:02 +0200, Bengt Rutisson wrote:
>> Hi everyone,
>>
>> Can I have a couple of reviews for this small change to update two
>> default values:
>>
>> http://cr.openjdk.java.net/~brutisso/8059452/webrev.00/
>>
>> https://bugs.openjdk.java.net/browse/JDK-8059452
>>
>>   From the bug report:
>>
>> When the flags G1HeapWastePercent and G1MixedGCLiveThresholdPercent were
>> introduced their default values were picked without much performance
>> analysis.
>>
>> Recent performance runs indicate that G1HeapWastePercent often benefit
>> from a lower value and that G1MixedGCLiveThresholdPercent benefit from a
>> higher value.
>>
>> Suggestion is to change the default for G1HeapWastePercent to 5 (used to
>> be 10) adn G1MixedGCLiveThresholdPercent to 85 (used to be 65).
>
> Fine with me.
>
> Thanks,
>    Thomas
>
>