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Use the DECwindows Motif Real-time Display › Set the Thresholds and Ranges

Set the Thresholds and Ranges

You can set threshold values for strip charts and bar graphs to alert you to potential performance problems. When a threshold value is exceeded, the color of the indicator changes. For example, the CPU utilization threshold on the strip chart in the CPU panel is set to alert you when CPU utilization exceeds 70 percent. If the percent utilization exceeds 70 percent the bar on the strip chart changes from black to red for the period of time during which the threshold is exceeded.

To set a threshold value:

  1. Click MB1 anywhere in the instrument to be modified. The instrument appears to be depressed to show that it has been selected.
  2. Press and hold MB3 to display the pop-up editing menu. The menu lets you edit the following items:
  3. Choose Ranges and Thresholds by moving the cursor over this selection and releasing the MB3 button. For example, the following dialog box is displayed when one of the graphs on the System Overview panel is selected, as shown in the following screen:

    This dialog box is also used to set the scale for an instrument. The maximum and minimum data values to be displayed for the bar or strip chart can be set. In addition, the strip chart can be set to automatic scaling whereby the height of the chart is dynamically adjusted to match the largest data value shown.

The Ranges and Thresholds dialog box lets you set two levels of thresholds.

To modify a threshold value

To apply your changes

  1. Click the Apply button at the bottom of the dialog box.
  2. When you are satisfied with all your changes and want to exit the dialog box, click OK; to exit without saving any changes, click Cancel.