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https://issues.apache.org/jira/browse/SPARK-4139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14188961#comment-14188961
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Apache Spark commented on SPARK-4139:
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User 'andrewor14' has created a pull request for this issue:
https://github.com/apache/spark/pull/3002
> Start the number of executors at the max if dynamic allocation is enabled
> -------------------------------------------------------------------------
>
> Key: SPARK-4139
> URL: https://issues.apache.org/jira/browse/SPARK-4139
> Project: Spark
> Issue Type: Improvement
> Components: YARN
> Affects Versions: 1.2.0
> Reporter: Andrew Or
> Assignee: Andrew Or
>
> SPARK-3795 allows us to dynamically scale the number of executors up and
> down. We should start the number at the max instead of from 0 in the
> beginning, because the first job will likely run immediately after the
> SparkContext is set up.
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