Owners Manual

Monitoring Network Availability | Performance Monitoring
OMNM 6.5.2 User Guide 383
Attribute Name—
Appears when you click Add rather than Edit ing 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.