liupc edited a comment on issue #23794: [SPARK-26884][CORE] Let task acquire memory accurately when using spilled memory URL: https://github.com/apache/spark/pull/23794#issuecomment-464073358 I think we acquire the amount of memory it needed no matter whether can be satisfied is what we need here, because the memory manager will give the right amount.If my understand is correct, your change seems to not improve this, but make the behavior change.
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