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From "Miklos Szegedi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-6442) Inaccurate javadoc in NodeManagerHardwareUtils.getContainerMemoryMB
Date Wed, 05 Apr 2017 01:32:41 GMT
Miklos Szegedi created YARN-6442:
------------------------------------

             Summary: Inaccurate javadoc in NodeManagerHardwareUtils.getContainerMemoryMB
                 Key: YARN-6442
                 URL: https://issues.apache.org/jira/browse/YARN-6442
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Miklos Szegedi
            Priority: Minor


NodeManagerHardwareUtils.getContainerMemoryMB has the following javadoc:
{code}
"If the OS has a
   * ResourceCalculatorPlugin implemented, the calculation is 0.8 * (RAM - 2 *
   * JVM-memory) i.e. use 80% of the memory after accounting for memory used by
   * the DataNode and the NodeManager. If the number is less than 1GB, log a
   * warning message."
{code}
I think the accurate expression is 0.8*(RAM-2*JVM)-systemreserved. I also do not see the 1GB
cap in the code.



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