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https://issues.apache.org/jira/browse/HBASE-15047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15073462#comment-15073462
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Elliott Clark commented on HBASE-15047:
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This would mean that there's no lock for queueing. There's no need to for a
queue.
> Try spin lock for MVCC completion
> ---------------------------------
>
> Key: HBASE-15047
> URL: https://issues.apache.org/jira/browse/HBASE-15047
> Project: HBase
> Issue Type: Bug
> Reporter: Elliott Clark
> Assignee: Elliott Clark
>
> Waits/Notify is very very expensive since it can cost a thread scheduling.
> There should only ever be a few threads ( < Num Cores ) running. So it should
> be possible to spin and use compare and swap to update the read point.
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