[jira] [Created] (FLINK-18762) Make network buffers per incoming/outgoing channel can be configured separately

[Shang Yuanchun (Jira)]

Yingjie Cao created FLINK-18762:
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             Summary: Make network buffers per incoming/outgoing channel can be configured separately
                 Key: FLINK-18762
                 URL: https://issues.apache.org/jira/browse/FLINK-18762
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / Network
            Reporter: Yingjie Cao
             Fix For: 1.12.0


In FLINK-16012, we want to decrease the default number of exclusive buffers at receiver side from 2 to 1 to accelerate checkpoint in cases of backpressure. However, number of buffers per outgoing and incoming channels are configured by a single configuration key. It is better to make network buffers per incoming/outgoing channel can be configured separately which is more flexible. At the same time, we can keep the default behavior compatible.



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