Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/18935#discussion_r133874147
--- Diff:
common/network-common/src/main/java/org/apache/spark/network/util/TransportConf.java
---
@@ -61,6 +62,7 @@ public TransportConf(String module, ConfigProvider conf) {
SPARK_NETWORK_IO_MAXRETRIES_KEY = getConfKey("io.maxRetries");
SPARK_NETWORK_IO_RETRYWAIT_KEY = getConfKey("io.retryWait");
SPARK_NETWORK_IO_LAZYFD_KEY = getConfKey("io.lazyFD");
+ SPARK_NETWORK_VERBOSE_METRICS = getConfKey("io.enableVerboseMetrics");
--- End diff --
Add a configuration to control whether to expose detailed metrics. Normally
detailed per arena metrics will not be tracked, user could enable this through
configuration, so that user has the ability to know the details of Netty memory
allocation behavior, which could potentially guid to fine-grained tune.
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