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Add note on nagles to perf section 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1379189 13f79535-47bb-0310-9956-ffa450edef68
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Michael Stack 2012-08-30 22:22:32 +00:00
parent f293c94c01
commit 9959725df4
1 changed files with 7 additions and 0 deletions
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src/docbkx/performance.xml
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@ -139,6 +139,13 @@
<title>HBase Configurations</title>
<para>See <xref linkend="recommended_configurations" />.</para>
<section xml:id="perf.nagels">
<title><link xlink:href="http://en.wikipedia.org/wiki/Nagle's_algorithm">Nagle's</link> or the small package problem</title>
<para>If a big 40ms or so occasional delay is seen in operations against HBase,
try the Nagles' setting. For example, see the user mailing list thread,
<link xlink:href="http://search-hadoop.com/m/pduLg2fydtE/Inconsistent+scan+performance+with+caching+set+&amp;subj=Re+Inconsistent+scan+performance+with+caching+set+to+1">Inconsistent scan performance with caching set to 1</link>
and the issue cited therein where setting notcpdelay improved scan speeds.</para>
</section>
<section xml:id="perf.number.of.regions">
<title>Number of Regions</title>