Post · Sep 23, 2026
A checkout endpoint with a log line at every step looks like good observability, right up until a customer says "my payment failed" and you have thirteen unrelated lines from thirteen unrelated requests to sort through. The fix isn't more logs, it's one wide event per request instead.
Post · Sep 17, 2026
The same endpoint, run through four traffic tiers. At 1k req/s almost any design survives. At 10k the database and the single instance give first. At 100k the cache and the load balancer become the systems under test. At 1M the architecture itself has to change, because the failure mode is no longer capacity, it's correlated behavior across clients you don't control.