OpManager allows you to set common monitoring settings for all the devices under a specific category.
To do so, follow the steps given below:
Under Settings > Configuration > Quick Configuration Wizard > click Monitoring Intervals.
To enable monitoring for a category, select the check box under Enable column for the infrastructure you want to monitor and enter the monitoring interval in minutes. To disable monitoring a specific category, uncheck the respective check box.
For instance, if you want to monitor servers every minute, ensure that the check box corresponding to Servers is selected and then enter '1' in the adjacent box.