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Zhihong Ted Yu commented on HBASE-4391: --------------------------------------- I built on MacBook. I guess the following is the equivalent: {code} -rwxr-xr-x 1 zhihyu 110088321 13320 Jun 24 07:41 libmlockall_agent.dylib {code} > 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: 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira