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https://issues.apache.org/jira/browse/FLINK-1291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14228445#comment-14228445
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ASF GitHub Bot commented on FLINK-1291:
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Github user uce commented on the pull request:
https://github.com/apache/incubator-flink/pull/240#issuecomment-64918186
Merging now.
> Remove GC options from JobManager and TaskManager scripts
> ---------------------------------------------------------
>
> Key: FLINK-1291
> URL: https://issues.apache.org/jira/browse/FLINK-1291
> Project: Flink
> Issue Type: Improvement
> Components: other
> Affects Versions: 0.8-incubating
> Reporter: Stephan Ewen
> Fix For: 0.8-incubating
>
>
> Currently, the start scripts set a series of GC options
> - The Tenured Gen GC is set to ConcurrentMarkSweep
> - The Perm Gen is set to be collected during swipes (CMSClassUnloading)
> - The ratio between Perm Gen and New Gen is fixed
> I propose to remove all of those options:
> - Users can pass their own GC arguments through the JAVA_OPTS
> - CMS is not considered a competitive GC any more (starting from Java 7, G1
> seems much better)
> - PermGen garbage collection happens in all GCs anyways
> - The ratio between TenuredGen and New Gen has proven harmful in the past
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