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https://issues.apache.org/jira/browse/FLINK-1291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14227939#comment-14227939
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ASF GitHub Bot commented on FLINK-1291:
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GitHub user StephanEwen opened a pull request:
https://github.com/apache/incubator-flink/pull/240
[FLINK-1291] Remove default GC options from the shell scripts
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/StephanEwen/incubator-flink scripts
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-flink/pull/240.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #240
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commit 1284d177e8d4fec07da85ed291a0be1af78706a5
Author: Stephan Ewen <[email protected]>
Date: 2014-11-27T19:41:40Z
[FLINK-1291] Remove default GC options from the shell scripts
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> 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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