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Posted to commits@cassandra.apache.org by "Jonathan Ellis (JIRA)" <ji...@apache.org> on 2014/02/06 19:38:09 UTC

[jira] [Commented] (CASSANDRA-6667) Mean cells per sstable is calculated incorrectly

    [ https://issues.apache.org/jira/browse/CASSANDRA-6667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13893632#comment-13893632 ] 

Jonathan Ellis commented on CASSANDRA-6667:
-------------------------------------------

(Tagged [~krummas] for review.)

> Mean cells per sstable is calculated incorrectly
> ------------------------------------------------
>
>                 Key: CASSANDRA-6667
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6667
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>            Priority: Minor
>             Fix For: 1.2.16, 2.0.6
>
>         Attachments: 6667.txt
>
>
> We currently take the average of the mean for each partition, rather than correctly weighting by cell count.  This affects hint paging as well as index selectivity calculation.



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