pnowojski commented on a change in pull request #11567: [FLINK-16645] Limit the
maximum backlogs in subpartitions
URL: https://github.com/apache/flink/pull/11567#discussion_r400323498
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File path:
flink-core/src/main/java/org/apache/flink/configuration/NettyShuffleEnvironmentOptions.java
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@@ -174,6 +174,19 @@
" help relieve back-pressure caused by
unbalanced data distribution among the subpartitions. This value should be" +
" increased in case of higher round trip times
between nodes and/or larger number of machines in the cluster.");
+ /**
Review comment:
Could you also update in the L159 description a bit? I think after we
dropped the non credit based code path, it is a bit out of date.
> Number of exclusive network buffers to use for each outgoing/incoming
channel (subpartition/input channel) in the credit-based flow control model. It
should be configured at least 2 for good performance. 1 buffer is for receiving
in-flight data in the subpartition and 1 buffer is for parallel serialization.
Otherwise, as it is, it is a bit confusing with the new description.
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