31.1.2 Overview of Graph Creation

Graphs are defined in XML files, then imported into MEM. The new custom graph is displayed in the Graphing category on the Advisors page.

For an example of how to create a graph, see Section 31.1.9, “Creating a New Graph: An Example”.

The XML elements for creating a graph are as follows:

• version

  The version number of the graph. Generally only important with the bundled graphs, and is only used internally.

• uuid

  The unique id of the graph. Each revision (version) requires a new uuid, which is only used internally.

• name

  The visible graph name, which is displayed within the graph listing. Note: graphs are sorted alphabetically.

• frequency

  Optionally define the frequency for the graph, which defaults to 1 minute. May use seconds, minutes, hours, and days.

• rangeLabel

  The Y-axis range label. For example, a graph about disk space usage may use MB.

• series

  Each series contains a label and an expression. The label is the visible name of the series, and the simple expression defines it.

• variables

  Each variables definition contains a name, instance, and dcItem element. The instance defines what data the graph displays, and each dcItem element contains a nameSpace, className, and attribName:

  • nameSpace

    Namespace (type) of the data collection item.

  • className

    Class (namespace type) of the data collection item.

  • attribName

    Attribute name of the data collection item.