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https://issues.apache.org/jira/browse/HBASE-11160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14126502#comment-14126502
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Enis Soztutar commented on HBASE-11160:
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[~jeffreyz] any input on this?
> Undo append waiting on region edit/sequence id update
> -----------------------------------------------------
>
> Key: HBASE-11160
> URL: https://issues.apache.org/jira/browse/HBASE-11160
> Project: HBase
> Issue Type: Sub-task
> Components: wal
> Affects Versions: 0.99.0
> Reporter: stack
> Assignee: stack
> Priority: Critical
> Fix For: 2.0.0, 0.99.1
>
>
> HBASE--11135 changed append to wait on the update of the edit/sequence id.
> This slows writes by a significant amount (50% slower?). [~jeffreyz] is
> going to look at updating MVCC inside in the ring buffer consumer thread just
> after the region edit/sequence id update. If that works, then we can undo
> having append wait on the sequence id update and get some of our speedup
> back. Marking this 0.99 and blocker so we don't forget about it (Undoing the
> wait is just a case of removing the few lines of latch code in FSWALEdit).
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