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https://issues.apache.org/jira/browse/HBASE-4391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matteo Bertozzi resolved HBASE-4391.
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Resolution: Fixed
> Add ability to start RS as root and call mlockall
> -------------------------------------------------
>
> Key: HBASE-4391
> URL: https://issues.apache.org/jira/browse/HBASE-4391
> Project: HBase
> Issue Type: New Feature
> Components: regionserver
> Affects Versions: 0.94.0
> Reporter: Todd Lipcon
> Assignee: Matteo Bertozzi
> Fix For: 0.96.0
>
> Attachments: 4391-v4.patch, HBASE-4391-v0.patch, HBASE-4391-v1.patch,
> HBASE-4391-v2.patch, HBASE-4391-v3.patch
>
>
> A common issue we've seen in practice is that users oversubscribe their
> region servers with too many MR tasks, etc. As soon as the machine starts
> swapping, the RS grinds to a halt, loses ZK session, aborts, etc.
> This can be combatted by starting the RS as root, calling mlockall(), and
> then setuid down to the hbase user. We should not require this, but we should
> provide it as an option.
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