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https://issues.apache.org/jira/browse/HIVE-22492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16975638#comment-16975638
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Hive QA commented on HIVE-22492:
--------------------------------
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12985982/HIVE-22492.2.patch
{color:green}SUCCESS:{color} +1 due to 2 test(s) being added or modified.
{color:green}SUCCESS:{color} +1 due to 17706 tests passed
Test results:
https://builds.apache.org/job/PreCommit-HIVE-Build/19452/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/19452/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-19452/
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.YetusPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12985982 - PreCommit-HIVE-Build
> 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-22492.2.patch, 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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