Configuring a Custom Performance Monitor Threshold

Track device performance using monitors and thresholds you choose. See abnormally spiked or light periods for one or more devices. Track overall trends against expected service level for many devices.

Configure a custom performance monitor threshold:

Name. Used in the Threshold library and the title on the Alert Center Home page.
Select Custom performance monitor.
- Select Scope. All devices (Global) versus selected devices (Device specific monitors)
- Select a monitor from the drop down list. For example, Select APC UPS, Printer, Active Script, SNMP, or WMI, and more.
- Monitor. The configured monitors of the selected type. These are the monitors used to determine if the measured parameters have dropped below or exceeded threshold limits.
Note: When you select Global Monitors, this list is populated with custom performance monitors currently configured in the Monitor Library. When you select Device Specific Monitors, this list is populated with custom performance monitors currently configured for specific devices.
Threshold Check Interval. Enter a time interval for Alert Center to check the Network Performance Monitor database for items that are out of the threshold limits.
Automatically resolve items no longer out of threshold. Select this option if you want Alert Center to automatically resolve items when they return to the value within the threshold limit.

Note: Notification policies are optional for most thresholds. If you do not select a notification policy, no notifications are generated for the threshold, but a dashboard report listing the out of threshold items still appears on the Alert Center Home page.

Thresholds

Average value. Choose a trend (Exceeds, Falls-below) and a value for the performance measurement. .
Duration. Specify a time range or "rolling interval" for calculating/totalling the performance measurement and comparing it to the threshold value.

Select Applied Devices

Apply to All Devices. By default, the threshold monitors all applicable hosts.
Exclude Devices. Select to build or apply an exclusion list.
Click Apply this Threshold to Specific Devices to choose the hosts to which the threshold applies.
Note: Configure the threshold check interval for a longer time than the sampling interval for thresholds relating to trends, such as percent utilization. Configure it for a time the same as (or similar to) the sampling interval when configuring a threshold for a health check.

Tip: Avoid setting the threshold check interval to a very short time. Aggressive intervals can degrade system performance. In general, setting the threshold check interval to less than five minutes is not advised.