A tool is provided to manage service instances for request processing that includes a monitor component, a manager component, and a configuration component. The monitor component is operable to determine a depth of message requests in a queue. The manager component is operable to manage a number of service instances processing the message requests. The configuration component is operable to set a threshold depth of message requests in the queue such that when the monitor component determines the depth of message requests in the queue exceeds the threshold, the monitor component initiates additional service instances to process the message requests.