zentol commented on a change in pull request #17067:
URL: https://github.com/apache/flink/pull/17067#discussion_r699159076
##########
File path: docs/content/docs/connectors/datastream/kafka.md
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@@ -213,26 +213,115 @@ Note that Kafka source does **NOT** rely on committed
offsets for fault toleranc
is only for exposing the progress of consumer and consuming group for
monitoring.
### Monitoring
-Kafka source exposes metrics in Flink's metric group for monitoring and
diagnosing.
-#### Scope of Metric
-All metrics of Kafka source reader are registered under group
```KafkaSourceReader```, which is a
-child group of operator metric group. Metrics related to a specific topic
partition will be registered
-in the group
```KafkaSourceReader.topic.<topic_name>.partition.<partition_id>```.
-For example, current consuming offset of topic "my-topic" and partition 1 will
be reported in metric:
-```<some_parent_groups>.operator.KafkaSourceReader.topic.my-topic.partition.1.currentOffset```
,
+Kafka source exposes the following metrics in the respective [scope]({{< ref
"docs/ops/metrics" >}}/#scope).
-and number of successful commits will be reported in metric:
-```<some_parent_groups>.operator.KafkaSourceReader.commitsSucceeded``` .
+#### Scope of Metric
-#### List of Metrics
+All metrics of Kafka source reader are registered under group ```<job metric
group>.<operator name>.<subtask>.KafkaSourceReader```, which is a
+child group of operator metric group. Metrics related to a specific topic
partition will be registered
+in the group ```<job metric group>.<operator
name>.<subtask>.KafkaSourceReader.topic.<topic_name>.partition.<partition_id>```.
+
+For example, current consuming offset of topic "my-topic" and partition 1 will
be reported in metric
+```<job metric group>.<operator
name>.<subtask>.KafkaSourceReader.topic.my-topic.partition.1.currentOffset```,
and number of successful commits will be reported in metric
+```<job metric group>.<operator
name>.<subtask>.KafkaSourceReader.commitsSucceeded```.
+
+<table class="table table-bordered">
+ <thead>
+ <tr>
+ <th class="text-left" style="width: 15%">Scope</th>
+ <th class="text-left" style="width: 18%">Metrics</th>
+ <th class="text-left" style="width: 18%">User Variables</th>
+ <th class="text-left" style="width: 39%">Description</th>
+ <th class="text-left" style="width: 10%">Type</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <th rowspan="2">Task</th>
+ <td>numBytesIn</td>
+ <td>n/a</td>
+ <td>The total number of input bytes since the source started. Count
towards the numBytesIn in TaskIOMetricsGroup.</td>
+ <td>Counter</td>
+ </tr>
+ <tr>
+ <td>numBytesInPerSecond</td>
+ <td>n/a</td>
+ <td>The input bytes per second.</td>
+ <td>Meter</td>
+ </tr>
+ <tr>
+ <th rowspan="10">Operator</th>
+ <td>numRecordsIn</td>
Review comment:
hmm these are all already documented as general operator task/operator
metrics; I don't think we need to document them again.
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