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Posted to issues@rocketmq.apache.org by "johnsonyjl (JIRA)" <ji...@apache.org> on 2017/10/30 14:01:00 UTC

[jira] [Created] (ROCKETMQ-307) some jvm arguments need changed for java 8 and direct memory GC

johnsonyjl created ROCKETMQ-307:
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             Summary: some jvm arguments need changed for java 8 and direct memory GC
                 Key: ROCKETMQ-307
                 URL: https://issues.apache.org/jira/browse/ROCKETMQ-307
             Project: Apache RocketMQ
          Issue Type: Improvement
          Components: rocketmq-externals
    Affects Versions: 4.2.0
         Environment: all
            Reporter: johnsonyjl
            Assignee: dongeforever
             Fix For: 4.2.0


* new jvm arguments -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m for jdk 8
* remove the -XX:+DisableExplicitGC, if use the DisableExplicitGC, the direct memory GC will be not run correctly. please refer to java.nio.Bits#reserveMemory method



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