A postmortem that is a story is read once and filed. One that ends in a list of owned, dated actions changes something. Time-to-detection is the number worth…
A database that takes forty seconds to initialise is marked unhealthy during every normal start, which trains everyone to ignore health status. start_period is the flag that makes…
A limit with no feedback means a well-behaved client cannot behave well — it finds out by being refused, and its only strategy is to retry. Retry-After is…
An object literal widens to its general types, so a configuration object loses exactly the information that would have made it useful. The last two lines are the…
A closure needing three variables from the enclosing scope required a use clause listing all three, which is why a one-line callback was four lines. The capture is…
A registry keyed by object identity keeps every object it has ever seen alive, so a long-running worker’s memory grows in proportion to the number of distinct objects…
Dropping an index that turns out to be load-bearing means rebuilding it on a large table under pressure, which is why unused-looking indexes survive for years. A week…