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Add note on running mlockall on startup to pin servers in physical mem 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1462296 13f79535-47bb-0310-9956-ffa450edef68
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Michael Stack 2013-03-28 20:41:09 +00:00
parent a39bfbde4a
commit 6c53baca62
1 changed files with 9 additions and 0 deletions
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9
src/docbkx/ops_mgt.xml
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@ -306,6 +306,15 @@ row10 c1 c2
<para>Note: just like RowCounter, caching for the input Scan is configured via <code>hbase.client.scanner.caching</code> in the
job configuration. </para>
</section>
<section xml:id="mlockall">
<title>mlockall</title>
<para>It is possible to optionally pin your servers in physical memory making them less likely
to be swapped out in oversubscribed environments by having the servers call
<link xlink:href="http://linux.die.net/man/2/mlockall">mlockall</link> on startup.
See <link xlink:href="https://issues.apache.org/jira/browse/HBASE-4391">HBASE-4391 Add ability to start RS as root and call mlockall</link>
for how to build the optional library and have it run on startup.
</para>
</section>
</section> <!-- tools -->