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https://issues.apache.org/jira/browse/HIVE-16503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16036625#comment-16036625
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Lefty Leverenz commented on HIVE-16503:
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Doc note: This adds two configs
(*hive.llap.mapjoin.memory.oversubscribe.factor* and
*hive.llap.memory.oversubscription.max.executors.per.query*) to HiveConf.java,
so they need to be documented in the wiki.
* [Configuration Properties -- LLAP |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-LLAP]
Added a TODOC3.0 label.
> LLAP: Oversubscribe memory for noconditional task size
> ------------------------------------------------------
>
> Key: HIVE-16503
> URL: https://issues.apache.org/jira/browse/HIVE-16503
> Project: Hive
> Issue Type: Improvement
> Components: llap
> Affects Versions: 3.0.0
> Reporter: Prasanth Jayachandran
> Assignee: Prasanth Jayachandran
> Labels: TODOC3.0
> Fix For: 3.0.0
>
> Attachments: HIVE-16503.1.patch, HIVE-16503.2.patch,
> HIVE-16503.3.patch, HIVE-16503.4.patch
>
>
> When running map joins in llap, it can potentially use more memory for hash
> table loading (assuming other executors in the daemons have some memory to
> spare). This map join conversion decision has to be made during compilation
> that can provide some more room for LLAP.
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