JMX configuration options

`capture_jmx_metrics`

Report metrics from JMX to the APM Server

Can contain multiple comma separated JMX metric definitions:

object_name[<JMX object name pattern>] attribute[<JMX attribute>:metric_name=<optional metric name>]

object_name:

For more information about the JMX object name pattern syntax, see the ObjectName Javadocs.
attribute:

The name of the JMX attribute. The JMX value has to be either a Number or a composite where the composite items are numbers. This element can be defined multiple times. An attribute can contain optional properties. The syntax for that is the same as for ObjectName.
- metric_name:
  
  A property within attribute. This is the name under which the metric will be stored. Setting this is optional and will be the same as the attribute if not set. Note that all JMX metric names will be prefixed with jvm.jmx. by the agent.

The agent creates labels for each JMX key property such as type and name.

The JMX object name pattern supports wildcards. The attribute definition does NOT support wildcards, but a special definition attribute[*] is accepted (from 1.44.0) to mean match all possible (numeric) attributes for the associated object name pattern The definition object_name[*:type=*,name=*] attribute[*] would match all possible JMX metrics In the following example, the agent will create a metricset for each memory pool name (such as G1 Old Generation and G1 Young Generation)

object_name[java.lang:type=GarbageCollector,name=*] attribute[CollectionCount:metric_name=collection_count] attribute[CollectionTime]

The resulting documents in Elasticsearch look similar to these (metadata omitted for brevity):

{
  "@timestamp": "2019-08-20T16:51:07.512Z",
  "jvm": {
    "jmx": {
      "collection_count": 0,
      "CollectionTime":   0
    }
  },
  "labels": {
    "type": "GarbageCollector",
    "name": "G1 Old Generation"
  }
}

{
  "@timestamp": "2019-08-20T16:51:07.512Z",
  "jvm": {
    "jmx": {
      "collection_count": 2,
      "CollectionTime":  11
    }
  },
  "labels": {
    "type": "GarbageCollector",
    "name": "G1 Young Generation"
  }
}

The agent also supports composite values for the attribute value. In this example, HeapMemoryUsage is a composite value, consisting of committed, init, used and max.

object_name[java.lang:type=Memory] attribute[HeapMemoryUsage:metric_name=heap]

The resulting documents in Elasticsearch look similar to this:

{
  "@timestamp": "2019-08-20T16:51:07.512Z",
  "jvm": {
    "jmx": {
      "heap": {
        "max":      4294967296,
        "init":      268435456,
        "committed": 268435456,
        "used":       22404496
      }
    }
  },
  "labels": {
    "type": "Memory"
  }
}

Default	Type	Dynamic
`<none>`	List	true

Java System Properties	Property file	Environment
`elastic.apm.capture_jmx_metrics`	`capture_jmx_metrics`	`ELASTIC_APM_CAPTURE_JMX_METRICS`