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https://issues.apache.org/jira/browse/HIVE-6418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13913813#comment-13913813
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Lefty Leverenz commented on HIVE-6418:
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This introduces a new config parameter, *hive.mapjoin.lazy.hashtable*, which
needs documentation.
But don't document it in hive-default.xml.template because that's going to be
overwritten after HIVE-6037 commits. You could document it in a comment in
HiveConf.java but most of the parameter comments will go away with HIVE-6037
and the descriptions will be incorporated into the parameter definitions.
So maybe the best course is to document it here in a release note, then it can
be added to HiveConf.java either before or after HIVE-6037 commits. (I'll make
a note there about this new parameter.)
> MapJoinRowContainer has large memory overhead in typical cases
> --------------------------------------------------------------
>
> Key: HIVE-6418
> URL: https://issues.apache.org/jira/browse/HIVE-6418
> Project: Hive
> Issue Type: Improvement
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-6418.01.patch, HIVE-6418.02.patch,
> HIVE-6418.03.patch, HIVE-6418.04.patch, HIVE-6418.04.patch,
> HIVE-6418.05.patch, HIVE-6418.WIP.patch, HIVE-6418.patch
>
>
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