Long garbage collection pause due to single-threaded CMS initial mark
Issue
- CMS initial mark phase is serial / single-threaded (
user~=realtime):
[GC [1 CMS-initial-mark: 1962869K(8388608K)] 2380861K(10424128K), 4.7281533 secs] [Times: user=4.74 sys=0.01, real=4.73 secs]
Environment
- OpenJDK
- Oracle JDK
- CMS (low pause) collector
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