Release It!, 2nd Edition

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Brainstorming ensued. Numerous proposals were thrown up and shot down, generally because the application code’s behavior under those circumstances was unknown. It quickly became clear that the only answer was to stop making so many requests to check schedule availability. With the weekend’s marketing campaign centered around free home delivery, we knew requests from the users were not about to slow down. We had to find a way to throttle the calls. The order management system had no way to do that.

We saw a glimmer of hope when we looked at the code for the store. It used a subclass of the standard resource pool to manage connections to order management. In fact, it had a separate connection pool just for scheduling ...