wsry commented on issue #11088: [FLINK-16012][runtime] Reduce the default number of buffers per channel from 2 to 1 URL: https://github.com/apache/flink/pull/11088#issuecomment-587384543 I did not increase the number of floating buffers. I guess we can make up the regression if we increase the number of floating buffers (maybe the only problem is that the floating buffer can't be always fulfilled). I'd like to do some test to see how many floating buffer we need to compensate the regression for the micro benchmark.
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