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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-15677) Ambari needs to set HDFS GC settings correctly
Date Mon, 04 Apr 2016 13:38:25 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-15677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15224128#comment-15224128
] 

Hudson commented on AMBARI-15677:
---------------------------------

SUCCESS: Integrated in Ambari-branch-2.2 #585 (See [https://builds.apache.org/job/Ambari-branch-2.2/585/])
AMBARI-15677. Ambari needs to set HDFS GC settings (vbrodetskyi: [http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=2ec92ffc11bbd2ba3e1466b094da2d15420240a0])
* ambari-server/src/main/resources/stacks/HDP/2.3/services/HDFS/configuration/hadoop-env.xml
* ambari-server/src/main/resources/stacks/HDP/2.2/services/HDFS/configuration/hadoop-env.xml
* ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/configuration/hadoop-env.xml


> Ambari needs to set HDFS GC settings correctly
> ----------------------------------------------
>
>                 Key: AMBARI-15677
>                 URL: https://issues.apache.org/jira/browse/AMBARI-15677
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.2.2
>            Reporter: Vitaly Brodetskyi
>            Assignee: Vitaly Brodetskyi
>            Priority: Critical
>             Fix For: 2.2.2
>
>         Attachments: AMBARI-15677.patch
>
>
> We need to make sure the Namenode CMS GC settings are correct.
> Ambari does not currently set -XX:CMSInitiatingOccupancyFraction=70 or -XX:+UseCMSInitiatingOccupancyOnly.
The NewSize needs also some tweaking: it should be 1/8th to 1/10th of the namenode heap size
in general, but it looks like we would cap at 8 gb like here (this NN has 112 GB heap).



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