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https://issues.apache.org/jira/browse/HIVE-10174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14392337#comment-14392337
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Prasanth Jayachandran commented on HIVE-10174:
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Should we have single writer memory manager (dynamic partition with sort
optimization or unpartitioned table) and multi writer memory manager (dynamic
partition with sort optimization disabled)?
> LLAP: ORC MemoryManager is singleton synchronized
> -------------------------------------------------
>
> Key: HIVE-10174
> URL: https://issues.apache.org/jira/browse/HIVE-10174
> Project: Hive
> Issue Type: Sub-task
> Components: File Formats
> Affects Versions: llap
> Reporter: Gopal V
> Attachments: orc-memorymanager-1.png, orc-memorymanager-2.png
>
>
> ORC MemoryManager::addedRow() checks are bad for LLAP multi-threaded
> performance.
> !orc-memorymanager-1.png!
> !orc-memorymanager-2.png!
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