zentol commented on a change in pull request #13640:
URL: https://github.com/apache/flink/pull/13640#discussion_r505036909
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File path: docs/monitoring/metrics.md
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@@ -847,6 +847,8 @@ Thus, in order to infer the metric identifier:
</table>
### Memory
+The memory-related metrics require Oracle's memory management (also included
in OpenJDK's Hotspot implementation) to be in place.
+Other JVM implementations (like IBM's J9) might lead to unexpected behavior.
Review comment:
Why not just say that in these cases metrics may not be exposed?
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