A partition where every remaining row was past its retention, eight months after the classification work. The partition scheme from 2023 aligns with the retention classes only at…
A promoted standby serving traffic with an empty cache and a cold opcode cache, measured during a drill. The warm-up script existed and was bound to the wrong…
A test asserting three things across two systems, failing intermittently for three years, split into three tests that each assert one. Splitting is diagnosis rather than a fix…
Eight thousand lines removed, and six classes in the shared kernel that lost their only consumer. A shared kernel accumulates by the two-consumer rule and does not shed…
An afternoon spent working out what actually runs when, which nobody had ever done. A matrix of six jobs and four triggers is twenty-four cells and nobody had…
A failover procedure with three WP-CLI steps, and the one that has to run before the database is writable. Three commands and an ordering constraint that is not…
Eighty-eight commands with one handler each, dispatched through four frames of indirection. A command bus provides cross-cutting concerns and eighty-eight one-to-one mappings provide indirection. The transaction middleware moved…
A cron listing with eleven entries, of which two called commands that no longer existed. A cron job whose command does not exist fails silently unless something checks…