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Posted to commits@cassandra.apache.org by "Chris Lohfink (JIRA)" <ji...@apache.org> on 2014/09/21 07:25:35 UTC

[jira] [Updated] (CASSANDRA-7247) Provide top ten most frequent keys per column family

     [ https://issues.apache.org/jira/browse/CASSANDRA-7247?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris Lohfink updated CASSANDRA-7247:
-------------------------------------
    Attachment: cassandra-2.1-7247.txt

> Provide top ten most frequent keys per column family
> ----------------------------------------------------
>
>                 Key: CASSANDRA-7247
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7247
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Chris Lohfink
>            Assignee: Chris Lohfink
>            Priority: Minor
>         Attachments: cassandra-2.1-7247.txt, jconsole.png, patch.txt
>
>
> Since already have the nice addthis stream library, can use it to keep track of most frequent DecoratedKeys that come through the system using StreamSummaries ([nice explaination|http://boundary.com/blog/2013/05/14/approximate-heavy-hitters-the-spacesaving-algorithm/]).  Then provide a new metric to access them via JMX.  



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