Jira admins can view (and stop, when necessary) current leveling operations by going to Administration | Structure | Structure.Gantt | Resource Leveling. 

The resource leveling screen lists all in-progress leveling operations on the Jira instance and how far along they are in their progress. To cancel a leveling operation, locate it in the list and click Stop.

Advanced Configurations

Several additional configurations can be set using the Structure Dark Features and Fine Tuning Interface, including:

  • Changing permission levels for Resource Leveling
  • Setting the maximum number of tasks that can be leveled
  • Allocating additional (or fewer) system resources to Resource Leveling
  • Disabling Resource Leveling

For more information, see Advanced Configurations for Structure.Gantt.