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Posted to issues@kylin.apache.org by "liyang (JIRA)" <ji...@apache.org> on 2017/08/20 04:48:00 UTC

[jira] [Updated] (KYLIN-2779) Segment size estimation is wrong for bitmap measure

     [ https://issues.apache.org/jira/browse/KYLIN-2779?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

liyang updated KYLIN-2779:
--------------------------
    Labels: scope  (was: )

> Segment size estimation is wrong for bitmap measure
> ---------------------------------------------------
>
>                 Key: KYLIN-2779
>                 URL: https://issues.apache.org/jira/browse/KYLIN-2779
>             Project: Kylin
>          Issue Type: Bug
>    Affects Versions: v2.0.0
>            Reporter: Alexander Sterligov
>            Assignee: Alexander Sterligov
>              Labels: scope
>
> If bitmap is used for distinct count, then size estimation is wrong for about 4 times.
> The problem is fixed by kylin.cube.size-estimate-countdistinct-ratio=0.2.



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