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https://issues.apache.org/jira/browse/KYLIN-2779?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shao Feng Shi closed KYLIN-2779.
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Resolution: Fixed
The estimation was improved a lot in Kylin 2.5. Please try to upgrade to a
newer version.
> 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
> Priority: Major
> 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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