RFR: Avoid superfluous proactive GCs

[Per Liden]

Thanks Erik!

/Per

On 2018-01-09 10:29, Erik Österlund wrote:
> Hi Per,
>
> Looks good.
>
> /Erik
>
> On 2018-01-08 15:58, Per Liden wrote:
>> When running applications with a very small live-set and very low
>> allocation rate there's a tendency to do proactive GCs a little too
>> often. An idling jshell instance is an example of an application where
>> this can be seen, where we're doing GCs like every 5 second or so,
>> which is just annoying. With this patch we only consider doing
>> proactive GCs if the app has eaten some memory (at least 10%) or
>> enough time has passed (5 min).
>>
>> http://cr.openjdk.java.net/~pliden/zgc/avoid_superfluous_proactive_gcs/webrev.0/
>>
>>
>> cheers,
>> Per
>