You can accomplish a "pause" by adjusting your service configuration to match your current number of running tasks. For example, if you currently have 3 running tasks in your service, you'd configure the service as below:
This tells the service:
- The number of tasks I want is [current-count]
- I want you to maintain at least [current-count]
- I don't want more than [current-count
These combined effectively halt your service from making any changes.