pub static LAST_NONZERO_QUEUE_DEPTH_AGE_MS: Key<Option<u64>>Expand description
How long ago proc-wide queue depth was last observed non-zero
(PD-7). None means no counted actor work has traversed the
queue accounting path since startup. Uses wall clock, so the
age is best-effort telemetry and may not be strictly monotonic.
Retained evidence — driven from the runtime accounting path.