pnowojski commented on a change in pull request #11567:
URL: https://github.com/apache/flink/pull/11567#discussion_r415797164
##########
File path:
flink-core/src/main/java/org/apache/flink/configuration/NettyShuffleEnvironmentOptions.java
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@@ -174,6 +173,20 @@
" 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.");
+ /**
+ * Number of max buffers can be used for each output subparition.
+ */
+ @Documentation.Section(Documentation.Sections.ALL_TASK_MANAGER_NETWORK)
+ public static final ConfigOption<Integer>
NETWORK_MAX_BUFFERS_PER_CHANNEL =
+ key("taskmanager.network.max-buffers-per-channel")
+ .defaultValue(Integer.MAX_VALUE)
Review comment:
Also I would set this to `10`. What do you think @zhijiangW ?
10 = 2 exclusive + 8 floating - so that single channel could use all of them
up, but if someone increases floating buffers, we have a sensible limit?
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