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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/01/08 23:16:36 UTC

[jira] [Commented] (SPARK-5157) Configure more JVM options properly when we use ConcMarkSweepGC for AM.

    [ https://issues.apache.org/jira/browse/SPARK-5157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14270128#comment-14270128 ] 

Apache Spark commented on SPARK-5157:
-------------------------------------

User 'sarutak' has created a pull request for this issue:
https://github.com/apache/spark/pull/3956

> 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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