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From "Erik Krogen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-10873) Add histograms for FSNamesystemLock Metrics
Date Mon, 19 Sep 2016 20:39:22 GMT
Erik Krogen created HDFS-10873:
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             Summary: Add histograms for FSNamesystemLock Metrics
                 Key: HDFS-10873
                 URL: https://issues.apache.org/jira/browse/HDFS-10873
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: namenode
            Reporter: Erik Krogen
            Assignee: Erik Krogen


It could be useful to have full histograms for how long operations are holding the namesystem
lock in addition to just rate information. This will, however, be a large number of emitted
metrics and likely require more coordination, so it may be best to have this be separately
configurable from more simple namesystem lock metrics. 



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