(DOCSP-13658): Add index recommendation to kafka sink connector (#21)

Author: nathan-contino-mongo

source/kafka-sink.txt

@@ -18,6 +18,15 @@ save the data to a datastore.
 This section of the guide covers the configuration settings necessary to
 set up a Kafka Sink connector.
 
+.. admonition:: Add Indexes to Your Collections for Consistent Performance
+   :class: important
+
+   Writes performed by the Kafka Sink Connector take additional
+   time to complete as the size of the underlying MongoDB collection
+   grows. To prevent performance deterioration,
+   :manual:`use an index to support these queries
+   <tutorial/create-indexes-to-support-queries/>`.
+
 .. toctree::
    :titlesonly:
    :hidden: