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https://issues.apache.org/jira/browse/HBASE-25442?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yulin Niu resolved HBASE-25442.
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Resolution: Won't Fix
> Refactor MultiVersionConcurrencyControl: replace readWaiters.notifyAll() with
> WriteEntry.notify()
> -------------------------------------------------------------------------------------------------
>
> Key: HBASE-25442
> URL: https://issues.apache.org/jira/browse/HBASE-25442
> Project: HBase
> Issue Type: Improvement
> Reporter: Yulin Niu
> Assignee: Yulin Niu
> Priority: Minor
> Attachments: 50M-performance.pdf
>
>
> [https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java#L217]
>
> here the notifyAll() wake up all thread, even the read point no big enough,
> bring extra thread switch
> [https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java#L143]
>
> WriteEntry object can be thread local to reuse
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