The cache expired at noon and the database fell over at 12:00:01. A lock, a two-tier expiry, jittered TTLs, and versioned keys — in that order of importance.
Compiled templates, container caches and route caches are regenerated on demand and written thousands of times, and every one of those writes goes to disk for no reason.…
Setting a thirty-second timeout on an HTTP call feels responsible and is not a limit on anything that matters when the upstream is merely slow rather than down.…
3.6 added lookup tables, which is WooCommerce admitting postmeta does not scale. What they contain, what they do not, and the regeneration nobody schedules.
Composing generators by looping and re-yielding works and loses the inner generator’s keys and its return value, which is usually discovered much later. Keys from the inner generator…
Changing the shape of a cached value makes every existing entry wrong, and there is no way to clear them selectively without knowing every key that exists. A…
Loading the extension slows execution substantially even with no session and no profiler running, because it installs hooks into the engine. The trigger form means the profiler runs…