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  1. JDK
  2. JDK-8153333 [REDO] STW phases at Concurrent GC should count in PerfCounter
  3. JDK-8164431

Release Note: New PerfCounters for STW Phases on Concurrent GC Are Available

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    Description

      A new GC performance counter has been added for pauses during the concurrent phase. This counter will be listed by `jstat` under the CGC (concurrent GC) heading. This information is only available for GCs with a concurrent phase and is GC specific:
      * G1 includes remark and cleanup pauses
      * CMS includes initial mark and remark pauses

      For CMS, these pauses were previously included in the time listed by `jstat` under the FGC (full GC) heading.

      The information is also available via the `jcmd` by using `PerfCounter.print`.

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              ysuenaga Yasumasa Suenaga
              rcalnan Roger Calnan
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