A single burn-rate window is either too twitchy or too slow, and pairing a long window with a short one gives both sensitivity and stability. The short window…
The optimiser chooses a plan from statistics it samples, and a table whose distribution has changed since the last sample gets a plan chosen for the old data.…
Logging every request at info level produces a volume nobody reads and a bill somebody notices, and the useful lines are a small fraction of it. Recording the…
A failover that has never been exercised is a procedure nobody has tested, and the first execution is always during an incident with an audience. Every one of…
A p99 in milliseconds means nothing to somebody who does not think in latency distributions, and Apdex compresses the same data into a number between zero and one.…
The three status fields people read all measure something slightly different from what the question was, and knowing which is which is the difference between a useful alert…
Logs answer what happened and traces answer what a request did, and a request that touches six services is a shape logs cannot represent. The value is entirely…
A health endpoint written as a controller action goes through routing, filters and model binding — which is exactly the machinery a health check should not depend on.…
Deploying to a host still receiving traffic means the requests in flight during the swap see a half-updated application, and there is no version of that which is…