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Posted to commits@cassandra.apache.org by "Chris Lohfink (JIRA)" <ji...@apache.org> on 2015/01/21 17:53:34 UTC

[jira] [Created] (CASSANDRA-8662) Switch cfhistograms from using yammer metrics in 2.1

Chris Lohfink created CASSANDRA-8662:
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             Summary: Switch cfhistograms from using yammer metrics in 2.1
                 Key: CASSANDRA-8662
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8662
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Chris Lohfink
            Assignee: Chris Lohfink


cfhistograms was changed to use the yammer histograms CASSANDRA-5871.  Until CASSANDRA-5657's change to metrics we shouldn't represent the yammer histogram for latency metrics.  Yammer's histogram is based on assumption of a normal distribution and is bad at representing the tail percentiles with skewed distributions.  So revert the change just in the 2.1 branch but leave it for 3.0.



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