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https://issues.apache.org/jira/browse/TEZ-3286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15313334#comment-15313334
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Siddharth Seth commented on TEZ-3286:
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Changed the title and added more information.
> Allow clients to set processor reserved memory per vertex (instead of per
> container)
> ------------------------------------------------------------------------------------
>
> Key: TEZ-3286
> URL: https://issues.apache.org/jira/browse/TEZ-3286
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.8.3
> Reporter: Wei Zheng
>
> tez.task.scale.memory.reserve-fraction can be set by clients to control how
> much memory is available to the processor. Ths values applies at a container
> level though, instead of at a vertex level.
> In case of a hash-join - the processor typically needs more memory. In case
> of a Shuffle join - the processor may not need as much. In DAGs with a mix
> of map joins and shuffle joins - setting this at a container level is
> sub-optimal.
> To a large extent this comes down to propagating vertex configs to the
> container / task.
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