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https://issues.apache.org/jira/browse/FLINK-4116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15350825#comment-15350825
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ASF GitHub Bot commented on FLINK-4116:
---------------------------------------
Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/2158#discussion_r68561918
--- Diff: docs/apis/common/index.md ---
@@ -1350,3 +1350,211 @@ You may specify program arguments before the job is
executed. The plan visualiza
the execution plan before executing the Flink job.
{% top %}
+
+Metrics
+-------------------
+
+Flink exposes a metric system that allows users gather and expose metrics
to external systems.
+
+### Registering metrics
+
+You can access the metric system from any user function that extends
[RichFunction]({{ site.baseurl }}/apis/common/index.html#rich-functions) by
calling getRuntimeContext().getMetricGroup().
+This method returns a MetricGroup object on which you can create and
register new metrics.
--- End diff --
`MetricGroup` should have backticks.
> Document metrics
> ----------------
>
> Key: FLINK-4116
> URL: https://issues.apache.org/jira/browse/FLINK-4116
> Project: Flink
> Issue Type: Improvement
> Components: Documentation, Metrics
> Affects Versions: 1.1.0
> Reporter: Chesnay Schepler
> Assignee: Chesnay Schepler
> Fix For: 1.1.0
>
>
> The metric system is currently not documented, which should be fixed before
> the 1.1 release.
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