Instrumentation is a critical part of any application. Along with system counters like cpu, heap, free disk, etc– it’s important to create application-level metrics to make sure health is measured closer to your customer’s experience. Example metrics could be user-registration, password-change, profile-change, etc. If you see a major spike or dip in these metrics, a wider problem could be indicated. For this example a custom metric was needed, and no infrastructure was in place for harv...
