Struct DeferredShrink 

pub struct DeferredShrink { /* private fields */ }

Grow immediately (stay responsive), but shrink only after the idle surplus has persisted for cooldown — damps grow→shrink→grow flapping. Holds its pending shrink deadline in a Cell<Option<Instant>> (interior mutability under &self, since the pool is a static); None = no shrink pending.

Implementations

impl DeferredShrink

pub const fn new(cooldown: Duration) -> Self

Create a policy that defers each shrink by cooldown after the pool first becomes over-provisioned.

Trait Implementations

impl ScalingPolicy for DeferredShrink

fn decide(&self, s: PoolStats, now: Instant) -> ScaleAction

Decide what to do given the current pool stats at time now.

fn deferred_until(&self) -> Option<Instant>

The next instant at which the pool must be re-evaluated even without a status signal (e.g. a deferred shrink’s cooldown). None = nothing pending. The supervisor arms a one-shot timer for it.