Struct SizeEvictionReporter 

struct SizeEvictionReporter {
    cache: &'static str,
    dropped: AtomicU64,
    last_warned: Mutex<Option<Instant>>,
}

Keeps capacity evictions observable without letting them flood the log.

Routine causes (expiry, explicit invalidation, replacement) are the steady state and stay at DEBUG. [RemovalCause::Size] is different: it means the cache is too small for the offered load, entries are lost that nothing asked to drop, and only an operator can fix it. Those evictions also arrive in bursts of thousands, so they are summarised rather than logged one by one - every drop is counted, and at most one WARN per SIZE_EVICTION_WARN_INTERVAL reports how many were shed since the previous one.

Fields

cache: &'static str

Which cache this reports for, as it appears in the warning.

dropped: AtomicU64

last_warned: Mutex<Option<Instant>>

None until the first warning, so the first capacity eviction is reported immediately.

Implementations

impl SizeEvictionReporter

fn new(cache: &'static str) -> Self

fn record(&self, cause: RemovalCause)

Records one eviction, warning about capacity pressure at most once per interval.