A cache entry expiring under load means every concurrent request recomputes it, and a lock makes them queue instead. One request recomputes slightly early while everybody else is…
Two services generating their own request identifiers means two traces for one request and no way to connect them. Deciding where the identifier originates is the whole conversation,…
Automatic certificate management is the default rather than a feature, which removes a category of configuration and a category of outage. The trade is real in both directions:…
An expression in a WHERE clause cannot use an index, and a generated column moves the expression somewhere indexable. The automatic substitution is the good part and requires…
A long window detects a sustained problem and keeps firing for hours after it ends, which trains people to ignore the alert. The long window is doing the…
Announcing a removal date without instrumentation means the date arrives and nobody can say whether removing it is safe. The brownout — disabling deliberately for a short window…