Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/18485#discussion_r125128668
--- Diff: docs/structured-streaming-programming-guide.md ---
@@ -1922,6 +1953,15 @@ Not available in R.
</div>
</div>
+### Reporting Metrics using Dropwizard
+Spark supports reporting metrics using the [Dropwizard
Library](monitoring.html#metrics). To enable metrics of Structured Streaming
queries to be reported as well, you have to explicitly enable the configuration
`spark.sql.streaming.metricsEnabled` in the SparkSession.
+
+{% highlight bash %}
+spark.conf().set("spark.sql.streaming.metricsEnabled", "true")
--- End diff --
I assume this is Java codes. Do you need to add example for Scala and
Python?
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