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Posted to issues@kylin.apache.org by "Shaofeng SHI (JIRA)" <ji...@apache.org> on 2018/07/17 03:33:00 UTC

[jira] [Assigned] (KYLIN-3452) Optimize spark cubing memory footprint

     [ https://issues.apache.org/jira/browse/KYLIN-3452?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shaofeng SHI reassigned KYLIN-3452:
-----------------------------------

    Assignee: Shaofeng SHI

> Optimize spark cubing memory footprint
> --------------------------------------
>
>                 Key: KYLIN-3452
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3452
>             Project: Kylin
>          Issue Type: Improvement
>          Components: Spark Engine
>            Reporter: Shaofeng SHI
>            Assignee: Shaofeng SHI
>            Priority: Major
>             Fix For: v2.5.0
>
>
> Noticed that there are some steps can be optimized:
> 1) Cuboid.findForMandatory() will create new object each time, which this can be cached;
> 2) Executor repeatedly load dictionary, not hit the cache;
> 3) NDCuboidBuilder and RowkeyEncoder, can optimize for less array copy;



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