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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-934) Job and TaskManager startup scripts always set JVM heap size
Date Sun, 15 Jun 2014 16:50:01 GMT

    [ https://issues.apache.org/jira/browse/FLINK-934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14031970#comment-14031970
] 

ASF GitHub Bot commented on FLINK-934:
--------------------------------------

Github user StephanEwen commented on the pull request:

    https://github.com/apache/incubator-flink/pull/18#issuecomment-46120860
  
    The akka-baed RPC we are trying out right now cannot transfer large data frames out of
the box. We are looking into solutions for that.
    
    Anyways, it is a flaw to allocate the entire buffer in memory before sending the on-disk
jars. That needs to be solved independently of the RPC.


> Job and TaskManager startup scripts always set JVM heap size
> ------------------------------------------------------------
>
>                 Key: FLINK-934
>                 URL: https://issues.apache.org/jira/browse/FLINK-934
>             Project: Flink
>          Issue Type: Improvement
>            Reporter: Ufuk Celebi
>            Assignee: Ufuk Celebi
>             Fix For: 0.6-incubating
>
>
> The default distribution config {{stratosphere-conf.yaml}} contains keys {{jobmanager.heap.mb}}
and {{taskmanager.heap.mb}} for the heap sizes of the JobManager and TaskManager JVMs. If
they are not set, {{config.sh}} has default values for them.
> We _always_ use one of these values and set the {{Xms}} and {{Xmx}} properties. After
a short discussion with [~rmetzger] and [~StephanEwen] we actually expected that they should
not be set if not found in {{stratosphere-conf.yaml}}. This would result in a fall back to
the respective JVM default (imho 1/4th of the physical memory since Java 6).



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