Measuring Stop-the-World(STW) Pauses

[Aleksey Shipilev]

On 5/22/19 9:50 PM, Alex Elent wrote:
> Just wanted to validate that this is also a STW pause:
> 
> 2019-05-22T19:45:37.182+0000: 66424.311: [Pause Init Mark (process weakrefs), 2.344 ms]

Yes, it is. If you are not sure, ask for safepoints logging (-XX:+PrintSafepointStatistics) and see
what operations are done when safepoint is taken -- most of them are GC ops.

-Aleksey