RFR (S) 8232051: Epsilon should warn about Xms/Xmx/AlwaysPreTouch configuration

[Zhengyu Gu]

Looks good to me.

Thanks,

-Zhengyu


On 10/15/19 1:33 PM, Aleksey Shipilev wrote:
> On 10/9/19 4:15 PM, Aleksey Shipilev wrote:
>> RFE:
>>    https://bugs.openjdk.java.net/browse/JDK-8232051
>>
>> This is arguably the UX bug: users expect low latency, but may not be aware that additional
>> configuration is needed for GCs to perform well in those conditions. Epsilon already enables LSM,
>> and should warn about Xms/Xmx/AlwaysPreTouch config too. It cannot adjust these settings, though,
>> because it would affect startup time -- users would have to opt-in.
>>
>> Fix:
>>    https://cr.openjdk.java.net/~shade/8232051/webrev.01/
> 
> Friendly reminder.
>