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Polish "Grafana Dashboard" section #5662

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30 changes: 3 additions & 27 deletions docs/modules/ROOT/pages/implementations/prometheus.adoc
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Expand Up @@ -86,34 +86,10 @@ See the https://prometheus.io/docs/querying/basics[Prometheus docs] for a far mo

=== Grafana Dashboard

A publicly available Grafana dashboard for Micrometer-sourced JVM and Tomcat metrics is available https://grafana.com/grafana/dashboards/4701-jvm-micrometer/[here].
There are many third-party Grafana dashboards publicly available on https://grafana.com/grafana/dashboards/?search=micrometer[GrafanaHub].
See an example https://grafana.com/grafana/dashboards/4701-jvm-micrometer/[here].

image::implementations/prometheus-dashboard.png[Grafana dashboard for JVM and Tomcat binders]

The dashboard features:

* JVM memory
* Process memory (provided by https://github.com/mweirauch/micrometer-jvm-extras[micrometer-jvm-extras])
* CPU-Usage, Load, Threads, File Descriptors, and Log Events
* JVM Memory Pools (Heap, Non-Heap)
* Garbage Collection
* Classloading
* Direct/Mapped buffer sizes

Instead of using the `job` tag to distinguish different applications, this dashboard makes use of a common tag called `application`, which is applied to every metric.
You can apply the common tag, as follows:

[source,java]
----
registry.config().commonTags("application", "MYAPPNAME");
----

In Spring Boot applications, you can use the https://docs.spring.io/spring-boot/docs/current/reference/html/actuator.html#actuator.metrics.customizing.common-tags[property support for common tags]:

[source,properties]
----
management.metrics.tags.application=MYAPPNAME
----
NOTE: The dashboards are maintained by the community in their external GitHub repositories, so if you have an issue, it should be created in their respective GitHub repository.

=== Counters

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