RFR: Adjust metaspace size during each GC

[Zhengyu Gu]

On 10/29/2018 08:44 AM, Aleksey Shipilev wrote:
> On 10/27/2018 01:54 PM, Zhengyu Gu wrote:
>> Of course, also for full GC:
>> Updated: http://cr.openjdk.java.net/~zgu/shenandoah/adj_metaspace/webrev.01/index.html
> 
> OK. We have to do this during safepoint, right? Otherwise it seems sensible to put this call near
> Universe::update_heap_info_at_gc() call in shControlThread.

I believe, G1 and ZGC both do this at safepoint.

Is okay to push?

Thanks,

-Zhengyu

> 
> -Aleksey
>