Configuring thresholds for monitors

 
Configuring thresholds enable OpManager to proactively monitor the resources and the services running on the servers and network devices, and raise alerts before they go down or reach the critical condition. OpManager offers multiple threshold levels namely Warning, Trouble and Error for breaking the fault into three stages and taking corrective actions accordingly.

You can configure multiple thresholds for the monitors that are associated to a single device, configure from the device template in order to apply across multiple devices and also configure from Quick Configuration Wizard.


Configure threshold limits for the monitors associated to a single device

  1. Go to the device snapshot page.
  2. Under Monitors tab, click on the edit icon  corresponding to the monitor for which you want to configure threshold limits. Edit Monitor page opens.
  3. Ensure that the SNMP OID and the monitoring Interval are configured.
  4. Specify the unit for the monitored resource in terms of percentage, MB, KB etc (based on how the parameter is measured).
  5. Select the condition [>,=, <, or !=] for Warning Threshold, Trouble Threshold & Error Threshold, and enter the value. Alert is raised if the monitored value is greater than, equal to, not equal to, or lesser than (which ever is selected ) the threshold value.
  6. Enter the Rearm Value. Rearm value is the value which the determines the monitor has restored to normal condition. For instance, the Warning threshold condition for a memory monitor is selected as greater than [>] and the threshold value is configured as 75. The monitored memory value of that device is 80. Now alert is raised and the monitor is in violated condition. At the next poll the monitored value is 72. An alert for returning to normal condition is generated. At the next poll again the monitored value goes to 80. Again a threshold violation alert is generated. In order to avoid this, enter the rearm value. Only if the monitored value reaches the rearm value the monitor goes to the normal condition and a normal alert is raised. Note: If you select the threshold conditions greater, then the rearm value should be lesser than the threshold value and vice versa.
  7. In the Consecutive Times field enter the value of how many consecutive times the thresholds (Warning, Trouble and Error) can be violated to generate the alert.
  8. Click on Advanced button to configure the Alarm Message and Severity. Based on the monitor, the values for Alarm message and severity are pre-configured by default.
  9. Click on OK.
Configure threshold limits for the devices from their device template page
  1. Go to the Device template page.
  2. Under Monitors tab, all the monitors that are currently associated with the devices are listed. If you want add or remove required monitors. Click on Edit Threshold button. Edit Thresholds page opens.
  3. Configure the Warning Threshold, Trouble Threshold, Error Threshold and Rearm Value and click on OK.
  4. Click on Apply.
  5. Select the devices for which you want to associate the monitors from the left column and move to the right column.
  6. Again click on Apply.
Configure thresholds for multiple devices from Quick Configuration Wizard
  1. From Admin page, click on Quick Configuration Wizard.
  2. Select Add Performance monitors to several devices (SNMP, WMI and CLI) option and click on Next.
  3. Open the required device template page and follow the steps from 2 to 6 of Configure thresholds for the devices from their device template page.

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