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Posted to hdfs-dev@hadoop.apache.org by "Erik Krogen (JIRA)" <ji...@apache.org> on 2016/09/19 20:39:22 UTC

[jira] [Created] (HDFS-10873) Add histograms for FSNamesystemLock Metrics

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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