Every PHP request opens its own database connection, so a hundred concurrent requests is a hundred connections — and there is no pool because there is no process…
A canary release without a decision rule is a slower deploy — somebody watches a dashboard for ten minutes, sees nothing obvious and promotes it. The minimum sample…
The aggregate boundary is not a modelling preference — it is the answer to which invariants must hold at every instant, and everything else can be eventually consistent.…
Instrumenting each service produces disconnected traces. Passing the trace context between them is what makes it one trace, and it is the part that breaks. The queue hop…
A client that times out and retries has sent the same request twice, and the server cannot tell whether the first one succeeded. Storing the response rather than…
Setting a thirty-second timeout feels responsible and does nothing about the number of workers waiting simultaneously, which is what actually takes a site down. Dropping the timeout from…