[jira] [Commented] (KYLIN-2244) "kylin.job.cuboid.size.memhungry.ratio" shouldn't be applied on measures like TopN

["Shaofeng SHI (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KYLIN-2244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15741102#comment-15741102 ] 

Shaofeng SHI commented on KYLIN-2244:
-------------------------------------

Deprecate "kylin.cube.size-estimate-memhungry-ratio" and add new "kylin.cube.size-estimate-countdistinct-ratio" (with default 0.05). When estimate the cuboid size, for count distinct measure (both HLL and Bitmap), use this ration. For dimension and other measure value, use the ordinary "kylin.cube.size-estimate-ratio" (default 0.25).

> "kylin.job.cuboid.size.memhungry.ratio" shouldn't be applied on measures like TopN
> ----------------------------------------------------------------------------------
>
>                 Key: KYLIN-2244
>                 URL: https://issues.apache.org/jira/browse/KYLIN-2244
>             Project: Kylin
>          Issue Type: Improvement
>          Components: Job Engine
>            Reporter: Shaofeng SHI
>             Fix For: v1.6.1
>
>
> The parameter "kylin.job.cuboid.size.memhungry.ratio" (new name " kylin.cube.size-estimate-memhungry-ratio") default value 0.05, is based on the compression ration on HyperLogLog; it doesn't fit for other memory hungry measures like TopN, Raw, etc;  



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