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https://issues.apache.org/jira/browse/HBASE-1576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12723381#action_12723381
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Andrew Purtell commented on HBASE-1576:
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Should the default also be upped to something like 30 as before, or even 100?
> TIF needs to be able to set scanner caching size for smaller row tables &
> performance
> -------------------------------------------------------------------------------------
>
> Key: HBASE-1576
> URL: https://issues.apache.org/jira/browse/HBASE-1576
> Project: Hadoop HBase
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.20.0
> Reporter: ryan rawson
> Assignee: Andrew Purtell
> Priority: Critical
> Fix For: 0.20.0
>
> Attachments: HBASE-1576.patch
>
>
> TIF goes with the default scanner caching size (1). When each row is
> processed very fast and is small, this limits the overall performance. By
> setting a higher scanner caching level you can achieve 100x+ the performance
> with the exact same map-reduce and table.
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