java深度 GC

java深度 GC
jvm reduceinitialcardmarks YoungGen OldGen card-marking performance optimization
-XX:-ReduceInitialCardMarks
http://bugs.sun.com/view_bug.do?bug_id=6896647
6896647 : card marks can be deferred too long
jstat -gcutil pid

upgrade your jdk to hs17.  hotspot.

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