Interface CacheDiagnosticsRecord

Cumulative counters for one (source alias, operation) pair (M98i).

Every settled backend call increments count and exactly one of succeeded (fulfilled) or failed (rejected, or threw synchronously). The detail counters increment only on a SUCCESSFUL call of their matching operation: hits/misses for get (non-null / null result), present/absent for has, removed/notRemoved for delete. set and clear carry only the outcome counters; every non-applicable counter is 0. Every counter saturates independently at Number.MAX_SAFE_INTEGER. No eviction count exists: a miss is never reported as an eviction. lastDurationMs is the integer duration, on the runtime's monotonic clock, of the most recently settled TIMED call — a source may time only a sample of calls (the built-in cache source times the first call per operation and one in every eight after it) — and is null when no call in the current retention window was timed. ageMs is the elapsed time since the most recent settled call, timed or not. Keys, prefixes, values, factory results and errors are never carried.