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https://issues.apache.org/jira/browse/HIVE-16553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15990149#comment-15990149
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Lefty Leverenz commented on HIVE-16553:
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Doc note: The wiki needs to be updated with this change in release 3.0.0.
(HIVE-16260 introduced *hive.tez.bigtable.minsize.semijoin.reduction* in
release 2.3.0.)
* [Configuration Properties -- hive.tez.bigtable.minsize.semijoin.reduction |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.tez.bigtable.minsize.semijoin.reduction]
Added a TODOC3.0 label.
> Change default value for hive.tez.bigtable.minsize.semijoin.reduction
> ---------------------------------------------------------------------
>
> Key: HIVE-16553
> URL: https://issues.apache.org/jira/browse/HIVE-16553
> Project: Hive
> Issue Type: Bug
> Components: Configuration
> Reporter: Jason Dere
> Assignee: Jason Dere
> Labels: TODOC3.0
> Fix For: 3.0.0
>
> Attachments: HIVE-16553.1.patch
>
>
> Current value is 1M rows, would like to bump this up to make sure we are not
> creating semjoin optimizations on dimension tables, since having too many
> semijoin optimizations can cause serialized execution of tasks if lots of
> tasks are waiting for semijoin optimizations to be computed.
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