JMX Custom Metrics
To configure which JMX metrics to monitor, edit the agent
com.instana.plugin.java: jmx: # JMX is NOT hot-reloaded and needs to be set before a JVM is discovered. # Supported attribute types are Number and Boolean # delta calculation is only supported for Number - object_name: 'java.lang:type=Compilation' metrics: - attributes: 'TotalCompilationTime' type: 'delta' # delta will report the change to the previous second - object_name: 'java.lang:type=ClassLoading' metrics: - attributes: 'LoadedClassCount' type: 'absolute' # absolute will report the value as-is
Two types of metrics are specified in the example above:
deltais used for values that increase over time, such as counters, where the relative change is considered interesting.
absoluteis used to show the actual value each time the metric is accessed.
The attribute specified must either be
Number (or one of its subclasses like
Double) or a
String representing a number.
On the JVM dashboard, the JMX metrics are displayed under Custom JMX metrics.
object_name may contain wildcard patterns as specified in Java's ObjectName API documentation. Here's an example of a configuration with wildcard patterns:
com.instana.plugin.java: jmx: - object_name: 'kafka.*:type=*-metrics,client-id=*,*' metrics: - attributes: 'incoming-byte-rate' type: 'absolute' - attributes: 'incoming-byte-total' type: 'absolute' - attributes: 'outgoing-byte-rate' type: 'absolute' - attributes: 'outgoing-byte-total' type: 'absolute'