Foglight for JMX 5.9.8 - User Guide

Derived Metrics

A metric is a specific value that is measured over time. There are two types of metrics in Foglight for JMX: raw metrics and derived metrics. Raw metrics are collected directly from the monitored environment and sent to the Foglight for JMX Management Server. Derived metrics are calculated from one or more raw or derived metrics. They are scoped to a topology type and can optionally be scoped to specific objects of that type. For more information about metrics, see the Foglight for JMX Administration and Configuration Help.

Exposed Relationships

An MBean relationship can be left unexposed, exposed as a reference relationship, or exposed as a containment relationship. References are usually made between a parent and child. Containment is useful where the health of the children impacts the health of a parent.

JMX Agent

Collects MBean attribute data from a specified MBean server. For more information, see About the JMX Agent.

JMX Discovery Agent

Discovers processes running on a target host and enables the JMX Agent to moniter them. For more information, see About the JMX Discovery Agent.

MBean

An MBean is a managed Java object that follows the design patterns set forth in the JMX specification. An MBean can represent a device, an application, or any managed resource. MBeans expose a management interface that consists of: a set of readable or writable attributes (or both), a set of invocable operations, and a self-description.

MBean Server

A managed object server in which MBeans are registered.

MBean Server Model

A model that specifies the MBean data to collect from the monitored server.

MBean Type

The JMX specification defines five types of MBean: Standard, Dynamic, Open, Model, MXBeans.

Observations

The collection of information over time. Observations can be of any type of object. The scope and quality of the information returned by an observation is determined by the time range used to retrieve the information.

Storage Types

There are three storage types available: metrics (numbers only), single value (any data type where only the current value is stored, usually reserved for configuration data (that is, data that doesn't change frequently)), and observations (any non-numeric data that changes over time and where a history is stored, such as a boolean).