[jira] [Created] (HBASE-12116) Hot contention spots

[stack (JIRA)]

stack created HBASE-12116:
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             Summary: Hot contention spots
                 Key: HBASE-12116
                 URL: https://issues.apache.org/jira/browse/HBASE-12116
             Project: HBase
          Issue Type: Bug
            Reporter: stack
            Assignee: stack


Playing with flight recorder, here are some write-time contentious 
synchronizations/locks (picture coming)



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