Meters are configured as part of health.xml using CanDI to create and update Java objects. Refer to health checking configuration for a full description of health.xml. Resin 4.0.17 and later includes a full compliemnt of pre-configured JMX meters in health.xml.

Note: <resin:AdminServices/> (or more precisely just <resin:StatsService/>) is required to support health meters and graphing.

Health meters are named using a concatenation of keys separated by pipe (|) characters, loosely organized from least specific to most specific. Since meter statistics are shared between each member in a Resin cluster, Resin will automatically prefix each meter name with the cluster node index to insure the name is unique between cluster members.

The pipe character in the name provides a secondary benefit of helping to enhance the /resin-admin UI by categorizing meters into drill downs. Consider the following example.

In this example, JVM|Compilation|Compilation Time provides the base of the name. For cluster node index 0, Resin prefixes the name with 00|. /resin-admin will then use the cluster index and first two keys to create drill downs to logically organized meters for display.