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Posted to yarn-issues@hadoop.apache.org by "rrim (JIRA)" <ji...@apache.org> on 2014/03/26 11:00:20 UTC

[jira] [Created] (YARN-1881) configuration for performance tuning

rrim created YARN-1881:
--------------------------

             Summary: 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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