Answer:   The Queue Capacity Throttle reduces the capacity and refill levels for all the trigger queues by the same percentage. For example, if you set the Queue Capacity Throttle to 50% of maximum, a trigger queue with a capacity of 10 and a refill level of 4 will have an adjusted capacity of 5 and an adjusted refill level of 2.

The Integration Server Administrator provides an Execution Threads Throttle that you can use to reduce the execution threads for all concurrent triggers by the same percentage. For example, if you set the Execution Threads Throttle to 50% of maximum,the Integration Server reduces the maximum execution threads for all concurrent triggers by half. A concurrent trigger with a maximum execution threads value of 6, has an adjusted maximum execution threads value of 3.