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

[Aleksey Shipilev]

Thank you, pushed.

-Aleksey

On 10/15/19 7:42 PM, Zhengyu Gu wrote:
> 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.