[jira] [Created] (HBASE-21107) add a metrics for netty direct memory

[huaxiang sun (JIRA)]

huaxiang sun created HBASE-21107:
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             Summary: add a metrics for netty direct memory
                 Key: HBASE-21107
                 URL: https://issues.apache.org/jira/browse/HBASE-21107
             Project: HBase
          Issue Type: Improvement
          Components: IPC/RPC
    Affects Versions: 2.0.1
            Reporter: huaxiang sun
            Assignee: huaxiang sun


This is separated from HBASE-20913 as I realized that netty direct memory usage 
needs to show up in metrics instead of at the web page.



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