Tackling performance issues
Technical metrics, such as response time, throughput, error rates or uptime indicate the responsiveness of the system. As long as the application's responsiveness is in acceptable ranges, there is arguably no other metric to consider. Insufficient performance means that the system's SLAs are not being met, that is, the response time is too high or client requests fail. Then the question arises: what needs to be changed to improve the situation?
Theory of constraints
If the desired load on the system increases, the throughput ideally increases as well. The theory of constraints is based on the assumption that there will be at least one constraint that will throttle the system's throughput. The constraints or bottlenecks therefore cause a performance regression.
Like a chain that is only as strong as its weakest link, the constraining resource limits the overall performance of the system or certain functionality thereof. It prevents the application from handling more...
