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https://issues.apache.org/jira/browse/HBASE-8420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13652211#comment-13652211
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Jean-Daniel Cryans commented on HBASE-8420:
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[~ndimiduk], you could be in a situation where in/out traffic is ok but the
memory used by pre-fetching is exploding, so yes you want some form of rate
limiting and for this case it has to be at the pre-fetchers level.
> Port HBASE-6874 Implement prefetching for scanners from 0.89-fb
> -----------------------------------------------------------------
>
> Key: HBASE-8420
> URL: https://issues.apache.org/jira/browse/HBASE-8420
> Project: HBase
> Issue Type: Improvement
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Attachments: 0.94-8420_v1.patch, 0.94-8420_v2.patch,
> trunk-8420_v1.patch, trunk-8420_v2.patch
>
>
> This should help scanner performance. We should have it in trunk.
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