A supervisor that quietly restarts a service is doing its job and hiding the problem, so a memory leak becomes a daily restart that nobody knows about. The…
A nightly dump that has exited zero for two years proves the dump command works, which is a different claim from the data being recoverable. Asserting on a…
The question was how to deploy four services, and the answer arrived before it. Naming what you actually need — scheduling, health, rolling deploys, secrets.
An hourly spike that made every request four hundred milliseconds slower for two seconds moved the average by nine milliseconds and was invisible in every graph anyone looks…
CPU, memory and disk are causes, and there are unlimited causes — most of them entirely compatible with a healthy system serving every request correctly. The test for…
A reload starts new workers with the new configuration and lets the old ones finish their current requests, so an nginx process list after a reload legitimately contains…
A timer that has been scheduled and has never actually renewed anything is untested code with a deadline, and the first sign of trouble is a browser warning.…
Routing failed messages somewhere they cannot block the main queue is correct design, and it converts a loud failure into a silent one unless something watches the depth.…