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https://issues.apache.org/jira/browse/AMBARI-20821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15978961#comment-15978961
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Dmytro Grinenko commented on AMBARI-20821:
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+1
> Update default values for YARN preemption in Ambari
> ---------------------------------------------------
>
> Key: AMBARI-20821
> URL: https://issues.apache.org/jira/browse/AMBARI-20821
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Reporter: Vitaly Brodetskyi
> Assignee: Vitaly Brodetskyi
> Fix For: 2.5.1
>
> Attachments: AMBARI-20821_trunk.patch
>
>
> Set 1)
> "yarn.resourcemanager.monitor.capacity.preemption.total_preemption_per_round"
> should >= 1 / #cluster-nodes. (For example, cluster has 20 nodes,
> total_preemption_per_round should be at least 1 / 20 = 0.05. (By default this
> is 0.1)
> This really should be part of stack-advisor.
> Set 2)
> yarn.resourcemanager.monitor.capacity.preemption.natural_termination_factor =
> 1 (by default is 0.2).
> The two configs will affect preemption for large containers like LLAP. We
> will put these suggestions to documentation, but it will be also good if we
> can update them in Ambari.
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