Performance metrics

You can view a wide range of performance metrics for your instance and for the machine on which your instance is running. The ServiceNow Performance homepage provides central access to different graph sets for monitoring the performance of your instance.

The Performance homepage features time series graphs for analyzing system behavior and patterns over selected time periods. The homepage interface provides:
  • Aggregate summaries of time series graph data
  • Graph overlay capability to compare two different data sources within a single graph
  • Diagnostic event overlay on each graph to highlight performance anomalies
  • Zoom controls to expand each graph and view time series details

You can also filter the data in each graph by using different measurements, such as maximum and minimum values, means, and medians.

The graph sets provide performance data for the following functional areas: AMB, Database, Discovery, MySQL Global Status, ServiceNow Servlet, and Slow Pattern. Some of these graphs are intended for use by ServiceNow Customer Support to troubleshoot performance issues or help you tune your system for maximum efficiency.

To open the Performance homepage, navigate to Self-Service > Homepage and in the homepage list, select ServiceNow Performance.

Note: The administrator or any user who can modify a homepage can also add performance metric graphs to a custom homepage. For more information, see Add existing reports to a homepage and Customize your homepage content.

Performance homepage features

The Performance homepage provides the following graph and display controls.
UI elements on the Performance homepage
Table 1. Performance homepage elements
Number Description
1 Graph controls:
  • Graph set - Graph collections for viewing performance in specific functional areas: AMB, Database, Discovery, MySQL Global Status, and Slow Pattern.
  • Monitorable items - Name of the instance under evaluation.
  • Timespan - Period over which the data is captured: 1 hour, 2 hours, 1 day, 7 days, or 30 days
  • Compare with graph list - Graph overlay feature that lets you select a graph from a different data source and compare it to the current graph set.
2 Suggestion icon - Opens the Index Suggestion window, which provides links to index suggestions that have been created for slow queries. For details, see Review index suggestions for slow queries.
3 Display controls:
  • Information tooltip - Point to an area to see details about it.
  • Documentation icon - Opens the documentation page for the graph set.
  • Fullscreen icon - Opens an enlarged view of the graph, which includes a legend that identifies the graph data.
4 Diagnostic Events widget - Lists system events that occurred during the selected timespan. Provides controls for displaying diagnostic events on graphs.

Display and zoom controls

Fullscreen graph view
Click the fullscreen icon to open an enlarged view of a graph. The fullscreen view includes a legend, with check boxes for controlling data displayed in the graph. To disable the display of a data item in a graph, clear its check box. On some graphs, you can also change the sort order of certain metrics in the legend.
Fullscreen view of System Overview graph with its legend
Zoom in on a selected area of the graph
Click and drag across a portion of the graph area to zoom in on that area and view details over a smaller time interval. To return to the original view, click Reset Zoom.
Graphs showing how to zoom in to see details

Graph overlays

Use the graph overlay feature to look for trends or patterns between different data sets. For example, you could overlay the Database Response graph over the System Overview graph to determine possible correlations.
  • In the Compare with graph list, select a performance graph to overlay the current graph set.
  • To remove the graph overlay, select None in the Compare with graph list.

Diagnostic event overlays

Display controls for diagnostic events
Use the following features in the Diagnostic Events widget to control the diagnostic events overlaid on graphs:
  • Show on graphs switch - Click to enable or disable the event overlay on the graph set. The event overlay is enabled when the switch is green. The following severity flags identify diagnostic events on the graphs:
    • I - Information
    • W - Warning
    • E - Error
  • Filter - Click the filter icon to limit events displayed on the graphs. Clear the check boxes for events you do not want displayed.
  • Clear filter - Click to reset the filter to its default state (show all events).
Diagnostic event information
  • If you enabled the diagnostic event display, point to an event in the graph to see its information.
  • For quick access to details on a particular event, click the event listed in the Diagnostic Events widget to open the Event Details form.
    Table 2. Event Details fields
    Field Description
    Name Type of event.
    Reported on Date and time of event.
    Detail Additional information on the event, such as type of plugin activated.
    Severity Type of diagnostic event:
    • I - Information
    • W - Warning
    • E - Error
    Status Event state:
    • Information
    • Open
    • Closed
    Configuration item Infrastructure component, if applicable.