A dead letter queue that had held between forty and eight thousand messages since 2019, empty for the first time. An empty dead letter queue is not the…
A pull-through cache with no garbage collection schedule, and a disk that filled at two in the morning. A cache grows without bound by definition and the only…
A runbook step naming a command that had been renamed in a refactor eight months earlier. A runbook is documentation that must execute correctly under pressure, which makes…
A crontab line from 2019 calling a script that had been rewritten twice and moved once, still working because of a symlink nobody remembered. Every layer was added…
A dashboard of fourteen panels, replaced by six, chosen by reading a quarter of incident messages. A dashboard built from available metrics answers what is measurable and a…