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Posted to issues@ambari.apache.org by "Vitaly Brodetskyi (JIRA)" <ji...@apache.org> on 2016/04/02 16:58:25 UTC

[jira] [Updated] (AMBARI-15677) Ambari needs to set HDFS GC settings correctly

     [ https://issues.apache.org/jira/browse/AMBARI-15677?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vitaly Brodetskyi updated AMBARI-15677:
---------------------------------------
    Attachment: AMBARI-15677.patch

> 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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