A Performance Counter monitor checks metrics about the health of the hardware or application.
Understanding the Relationship Between Parent and Child Monitors
There are a few considerations regarding parent and child monitors that you must keep in mind when creating a Performance Counter monitor:
- changing a parent's monitor or alert configuration does not change existing child monitors. It only affects new child monitors that are created after the changes are saved.
- changing a child's monitor or alert configuration does not change the parent's configurations.
- changing a child's monitor or alert configuration does not change other child monitor's configurations.
- a child monitor that is deleted will be recreated the next time the scan detects it.
- to stop the monitoring and alerting, the monitor has to be disabled.
- to stop the monitor from being created, a regular expression needs to be used that will not detect it or disable the parent. Disabling the parent also prevents other counters, that may be wanted, from being created.
- deleting the parent monitor deletes all child monitors created by the parent, even if the child has been modified.
- deleting the parent monitor does not delete child monitors reated by other parent monitors.
- disabling the parent does not disable existing child monitors.
- disabling the child does not disable the parent or other child monitors.
To add a monitor for a performance counter
- In Service Center, click Configuration > Monitor & Alert Rules.
- From the Site list, select the site where the device is located.
- From the Device list, select the device to which you want to add a monitor.
- Click Add Monitor.
- From the Choose Monitor Type list, select Performance Counters.
- Click Add Monitor.
- In the Monitor tab, type a title for the monitor.
- Optionally, type a description for the monitor.
- Ensure the Enabled check box is selected.
- Select the performance object to monitor from the Performance Object list.
- From the Object Instance list, select the instance, if needed.
- To monitor all performance counter instances, select the All Available Instances check box unless you are setting up a monitor for logical disk free space. Drive space monitors function differently and require the use of a regular expression.
- Select the Instance Selection by Regular Expression check box, and then enter the following regular expression in the Regular Expression box: ^[C-Z]:$ . This can also be used to limit your search. For example, if a device has two hard drives, a drive C and a drive M, you could exclude certain drives by entering ^[C-L]:$, which would monitor the C drive but not the M drive.
- From the Counter list, select the counter.
If available, the Counter Help appears, which provides a description of the counter.
- If you selected the All Available Instances check box, the Discovery Interval list is available. From this list, select an appropriate time to set how frequently Onsite Manager scans for new performance counters on the target device.
- From the Polling Interval list, select an appropriate time to set how frequently the data is captured.
- Do one of the following to set when the monitor runs:
- To set the monitor to run all the time, do nothing.
- To change when the monitor runs, click Run Always to open the Select Interval dialog box and select either the Daily Interval or Specific Interval option button and use the corresponding lists to define the monitoring. Click OK.
- To configure an alert, see Setting Alert Actions.
- Click Save.