The thresholds panel allows the user to set threshold intervals on attributes in the monitor. The table lists the attributes for which attributes have been configured. Each row has an edit action and delete action. The Add button allows thresholds to be specified for another attribute. If all monitor attributes have thresholds defined for them the Add button will be disabled.
The Add or Edit buttons open a threshold editor (blank or with existing, configured thresholds, respectively).
Configure threshold intervals you Add at in the editor screen according to the following parameters.
Attribute Name -- Appears when you click Add rather than Editing a selected threshold. Use the pick list that appears in this screen to select the attribute for which you are specifying threshold information. When you Edit, the name of the attribute appears as a title within the editor screen.
Calculation Type -- Select from the pick list. Specifies whether the range calculation is to be done based on Average or Consecutive values.
Consecutive Value Count -- Select how many consecutive values to consider at once for a range calculation. Typically the larger the number here, the less “flutter” in reporting threshold crossings.
Emit Notification -- Check to emit an event if the device crosses the configured threshold(s). The notification event contains the threshold-crossing value, as well as which threshold was crossed, and is an alarm at the severity selected when you configure the threshold.
You can make a set of thresholds for each monitored attribute, so a single monitor can throw different alarms for different attributes. To see available events and their descriptions, view the contents of the RedcellMonitor-MIB in \owareapps\performance\mibs.
Apply to Series -- Check to enable on composite attributes only. Checking this applies the threshold to individual elements within the series. When it is unchecked, the threshold applies only to aggregate measurements (the overall value of the series), not individual elements within the series.
For example; a Key Metric monitor for CPU utilization on a device with two CPUs actually monitors both CPUs. When unchecked, the threshold applies to the average of both CPUs, when checked, the threshold applies to each individual CPU.
You can also apply thresholds to regular expressions. This is useful to monitor components within components, for example cores within a CPU.
Click Apply to preserve your edits, or Cancel to abandon them.
The threshold interval editor pops up when you select the Add button or the Edit icon to the right of a threshold’s row in the threshold attribute editor.
This screen contains the following fields:
Name -- The identifier for the threshold interval.
Severity -- The event severity for crossing this threshold interval (informational/indeterminate/warning/minor/major/critical)
Color -- The color to display threshold interval on graphs.
Lower Boundary -- The interval’s lower boundary.
Upper Boundary -- The interval’s upper boundary. May be blank.
Matching String -- A Regex matching string.
Threshold Graph Background
If you configure a set of thresholds, the dashboard graph displaying the data monitored displays the threshold colors (and text label) in the background. When an upper or lower threshold has no upper or lower bound, then those background colors may appear as white.