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From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-16503) LLAP: Oversubscribe memory for noconditional task size
Date Wed, 26 Apr 2017 17:30:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15985210#comment-15985210
] 

Prasanth Jayachandran commented on HIVE-16503:
----------------------------------------------

dynamic_semijoin_user_level.q is failing already in master (tracked in HIVE-16540) and not
related to this patch. 

> 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
>         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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