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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1881) configuration for performance tuning
Date Wed, 26 Mar 2014 16:09:15 GMT

    [ https://issues.apache.org/jira/browse/YARN-1881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13948040#comment-13948040
] 

Karthik Kambatla commented on YARN-1881:
----------------------------------------

[~rym] - thanks for reaching out. We typically use the user-lists (user@hadoop.apache.org)
to discuss issues encountered by users. Once we arrive at a specific cause, we use JIRA to
keep track of the progress. 


> configuration for performance tuning
> ------------------------------------
>
>                 Key: YARN-1881
>                 URL: https://issues.apache.org/jira/browse/YARN-1881
>             Project: Hadoop YARN
>          Issue Type: Test
>          Components: nodemanager
>    Affects Versions: 2.2.0
>            Reporter: rrim
>
> Hi,
> my MR jobs run very slow on hadoop, some block in reduce tasks
> -input data is small, number of splits is 2 
> -memory is available ('free -m' shows a usage under 4GB per node), each node has 32GB
> -yarnchild(s) are consuming 100% CPU (tests with "top")
> and I don't find ways to improve performance 
> best



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