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https://issues.apache.org/jira/browse/HIVE-22492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16973593#comment-16973593
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Slim Bouguerra commented on HIVE-22492:
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[~t3rmin4t0r] can you take a look at this seems to be a very low hanging fruit.
> Amortize lock contention due to LRFU accounting
> -----------------------------------------------
>
> Key: HIVE-22492
> URL: https://issues.apache.org/jira/browse/HIVE-22492
> Project: Hive
> Issue Type: Improvement
> Reporter: Slim Bouguerra
> Assignee: Slim Bouguerra
> Priority: Major
> Attachments: HIVE-22492.patch, llap-lock-contention.svg
>
>
> LRFU eviction policy can be a major source of contention under high load.
> This can be see on the following profiles.
> To fix this the idea is to use a batching wrapper to amortize the locking
> contention.
> The trick i a common way to amortize locking as explained here
> http://www.ece.eng.wayne.edu/~sjiang/pubs/papers/ding-09-BP-Wrapper.pdf
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