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https://issues.apache.org/jira/browse/TEZ-2850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14904597#comment-14904597
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Saikat commented on TEZ-2850:
-----------------------------
Thanks [~gopalv] [~sseth] for the explanation. So how do we go about handling
this scenario.
Can we have a TEZ config flag to turn on/off this optimization feature? If so
what name should be used for the flag. I can submit a patch for review.
So this IFileInputStream optimzation flag and/or tweaking the
shuffle.merge.percent flag can resolve this problem.
(without this optmization turned off, we might need to put a very low value of
around 0.01 for shuffle.merge.percent)
> Tez MergeManager OOM for small Map Outputs
> ------------------------------------------
>
> Key: TEZ-2850
> URL: https://issues.apache.org/jira/browse/TEZ-2850
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Saikat
> Attachments: OOM_1.png, OOM_2.png, OOM_3.png, TEZ-2850_test.patch
>
>
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