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https://issues.apache.org/jira/browse/HBASE-6925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13488997#comment-13488997
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stack commented on HBASE-6925:
------------------------------

Looks like HBaseClient in 89fb and in trunk or 0.94 are very different.  That 
might explain it Lars (Looking at the 89fb client, I can see how brother 
Karthik's change could make such a big difference).
                
> Change socket write size from 8K to 64K for HBaseServer
> -------------------------------------------------------
>
>                 Key: HBASE-6925
>                 URL: https://issues.apache.org/jira/browse/HBASE-6925
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Performance
>            Reporter: Karthik Ranganathan
>            Assignee: Karthik Ranganathan
>            Priority: Critical
>             Fix For: 0.94.3, 0.96.0
>
>         Attachments: HBASE-6925.patch
>
>
> Creating a JIRA for this, but the change is trivial: change NIO_BUFFER_LIMIT 
> from 8K to 64K in HBaseServer. This seems to increase scan throughput.

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