Github user mxm commented on the pull request:
https://github.com/apache/flink/pull/410#issuecomment-74642763
Right now, the user has to set the parallelism to
`ExecutionConfig.PARALLELISM_AUTO_MAX`. Why not use all available task slots by
default? I understand, that we shouldn't simply grab all resources but the auto
parallelism will only grab the resources which were already granted to Flink.
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