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From "Richard Zang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-11472) Namenode Advanced settings - Documentation Improvement - NameNode new generation size
Date Thu, 28 May 2015 00:25:17 GMT
Richard Zang created AMBARI-11472:
-------------------------------------

             Summary: Namenode Advanced settings - Documentation Improvement - NameNode new
generation size
                 Key: AMBARI-11472
                 URL: https://issues.apache.org/jira/browse/AMBARI-11472
             Project: Ambari
          Issue Type: Bug
          Components: ambari-web
    Affects Versions: 2.1.0
            Reporter: Richard Zang
            Assignee: Richard Zang
             Fix For: 2.1.0
         Attachments: AMBARI-11472.patch

On the Ambari help page on internet we document 

NameNode new generation size	
||Heading 1||Heading 2||
|NameNode new generation size|Default size of Java new generation for NameNode (Java option
-XX:NewSize) Note: The value of NameNode new generation size (default size of Java new generation
for NameNode (Java option -XX:NewSize)) should be 1/8 of maximum heap size (-Xmx). Ensure
that the value of the namenode_opt_newsize property is 1/8 the value of maximum heap size
(-Xmx).|

However when we show the help tool tip for this setting we don't show this info at all. This
info is very helpful to setup right values. Please show that recommendation is 1/8 of heap
memory



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