vanzin commented on a change in pull request #23560: [SPARK-26632][Core]
Separate Thread Configurations of Driver and Executor
URL: https://github.com/apache/spark/pull/23560#discussion_r279843994
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File path: docs/configuration.md
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@@ -1954,6 +1954,46 @@ Apart from these, the following properties are also
available, and may be useful
</tr>
</table>
+### Thread Configurations
+
+Depending on jobs and cluster configurations, we can set number of threads in
several places in Spark to utilize
+available resources efficiently to get better performance. Prior to Spark 3.0,
these thread configurations apply
+to all roles of Spark, such as driver, executor, worker and master. From Spark
3.0, we can configure threads in
+finer granularity starting from driver and executor. Take RPC module as
example in below table. For other modules,
+like shuffle, just replace "rpc" with "shuffle" in the property names except
+spark.{driver|executor}.rpc.netty.dispatcher.numThreads, which is only for RPC
module.
Review comment:
Wrap config names with `<code></code>`, here and elsewhere.
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