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From "Gunther Hagleitner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-16503) LLAP: Oversubscribe memory for noconditional task size
Date Tue, 25 Apr 2017 01:25:06 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15982242#comment-15982242
] 

Gunther Hagleitner commented on HIVE-16503:
-------------------------------------------

LGTM +1. Some smaller questions:

- Is SESSIONS_PER_DEFAULT_QUEUE guaranteed to be >= 1?

- Does it make sense to add range validators for the new settings (0, 1.0)?

> 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
>
>
> 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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