The Progress Application Server Sessions Utilization High rule triggers an alert when the percentage of the number of sessions utilized by the selected ABL applications exceeds a threshold value. The default threshold value is 80% of the maximum sessions of the PAS instance.

The Applications List section displays all the ABL applications that are currently deployed, and you can select the desired ABL applications from the list. For more information about modifying a monitoring plan and the rules associated with it, see Modify PAS for OpenEdge monitoring plans.
Note: You must select at least one ABL application from the Applications List section before saving the rule. If not, a validation message is displayed.
The percentage of the number of sessions utilized by the ABL applications is calculated using the following formula: 
Number of sessions utilized = Current session count/(Maximum number of agents * Maximum ABL sessions per agent)
For configuring the maximum number of agents and maximum ABL sessions per agent, see Configure tuning parameters and process limits.