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From "Kousuke Saruta (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-5157) Configure more JVM options properly when we use ConcMarkSweepGC for AM.
Date Thu, 08 Jan 2015 20:11:35 GMT
Kousuke Saruta created SPARK-5157:
-------------------------------------

             Summary: Configure more JVM options properly when we use ConcMarkSweepGC for
AM.
                 Key: SPARK-5157
                 URL: https://issues.apache.org/jira/browse/SPARK-5157
             Project: Spark
          Issue Type: Improvement
          Components: YARN
    Affects Versions: 1.3.0
            Reporter: Kousuke Saruta


When we set `SPARK_USE_CONC_INCR_GC`, ConcurrentMarkSweepGC works on the AM.
Actually, if ConcurrentMarkSweepGC is set for the JVM, following JVM options are set automatically
and implicitly.

* MaxTenuringThreshold=0
* SurvivorRatio=1024

Those can not be proper value for most cases.
See also http://www.oracle.com/technetwork/java/tuning-139912.html



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