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https://issues.apache.org/jira/browse/HBASE-4487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13257272#comment-13257272
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Hudson commented on HBASE-4487:
-------------------------------

Integrated in HBase-TRUNK-security #175 (See 
[https://builds.apache.org/job/HBase-TRUNK-security/175/])
    HBASE-5782 Edits can be appended out of seqid order since HBASE-4487 
(Revision 1327673)

     Result = FAILURE
larsh : 
Files : 
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java
* 
/hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestHLog.java

                
> The increment operation can release the rowlock before sync-ing the Hlog
> ------------------------------------------------------------------------
>
>                 Key: HBASE-4487
>                 URL: https://issues.apache.org/jira/browse/HBASE-4487
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>             Fix For: 0.94.0
>
>         Attachments: 4487-v7.txt, appendNoSync4.txt, appendNoSync5.txt, 
> appendNoSync6.txt
>
>
> This allows for better throughput when there are hot rows.I have seen this 
> change make a single row update improve from 400 increments/sec/server to 
> 4000 increments/sec/server.

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