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From Kévin LOVATO (JIRA) <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-12876) Negative mean write latency
Date Thu, 03 Nov 2016 16:25:59 GMT
Kévin LOVATO created CASSANDRA-12876:
----------------------------------------

             Summary: Negative mean write latency
                 Key: CASSANDRA-12876
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12876
             Project: Cassandra
          Issue Type: Bug
          Components: Observability
            Reporter: Kévin LOVATO
         Attachments: negative_mean.png, negative_mean_periodicity.PNG

The mean write latency returned by JMX turns negative every 30 minutes. As the attached screenshots
show, the value turns negative every 30 minutes after the startup of the node.
We did not experience this behavior in 2.1.16.



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