?????????????cmsGC???????????????????jvm????-XX:CMSInitiatingOccupancyFraction?????15???????С????cms????????????????????cmsgc?old?????????????cms??????

??????????????￡?


????2. fullgc???????

??????????cms??????????????cmsgc????????????fullgc??


????????????????fullgc?????????????6~7s???????????????????????????????????????cms?????????????????????￡???????????Сcms???????????紥??cmsgc????????fullgc?????????????????


???????????cmsgc???????????????????????????????2?????????cms??????????????????????????????????????????????????????????????????????????cms??????????

????3. ???????й?????????


?????????????cmsgc??л???????old????????????????????й?

???????п??????OOM????????????dump?????з?????

???????oom???dump???????????????????jvm??????

????-XX:HeapDumpPath=/home/admin/logs

????-XX:ErrorFile=/home/admin/logs/hs_err_pid%p.log

?????????????MAT?????????????????幤????????????????

??????л???????????У??

??????InfoQ????????????????????????????????editors@cn.infoq.com???????????????????(@InfoQ)??????????(@InfoQ)?????????????????????????????????????