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https://issues.apache.org/jira/browse/TEZ-699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14046409#comment-14046409
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Rohini Palaniswamy commented on TEZ-699:
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http://docs.oracle.com/javase/6/docs/technotes/guides/vm/gc-ergonomics.html -
initial heap size: Larger of 1/64th of the machine's physical memory on the
machine or some reasonable minimum. On a 24G box I checked InitialHeapSize was
370+MB (1/64). Machines with bigger RAM will automatically have higher Xms. So
I think it is best to leave it to system defaults than doing 25% of container
size.
> Have sensible defaults for java opts
> ------------------------------------
>
> Key: TEZ-699
> URL: https://issues.apache.org/jira/browse/TEZ-699
> Project: Apache Tez
> Issue Type: Sub-task
> Reporter: Bikas Saha
> Assignee: Hitesh Shah
> Attachments: TEZ-699.1.patch
>
>
> Its a burden to have to specify them all the time. API's already exist if
> users want to set special values. Also, for vertex memory would be good to
> have a TezUtils.getDefaultVertexResource() with a sensible resource size.
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