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Posted to dev@kylin.apache.org by "Shaofeng SHI (JIRA)" <ji...@apache.org> on 2015/06/30 04:35:04 UTC

[jira] [Commented] (KYLIN-839) Optimize Snapshot table memory usage

    [ https://issues.apache.org/jira/browse/KYLIN-839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14606883#comment-14606883 ] 

Shaofeng SHI commented on KYLIN-839:
------------------------------------

Use dictionary to encode the whole lookup table, and is compitable for old snapshots; Code change was submitted to 0.7 and 0.8 branches;

> Optimize Snapshot table memory usage 
> -------------------------------------
>
>                 Key: KYLIN-839
>                 URL: https://issues.apache.org/jira/browse/KYLIN-839
>             Project: Kylin
>          Issue Type: Bug
>            Reporter: liyang
>            Assignee: Shaofeng SHI
>              Labels: newbie
>
> Currently Snapshot memory structure is very inefficient. E.g. it goes OOM when building a cube with a lookup table of 272 MB with 3 GM java heap.



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