Struct TinyLfuConfig 

pub struct TinyLfuConfig {
    pub sketch_bytes: Option<usize>,
    pub promotion_threshold: Option<u32>,
    pub probation_target_pct: Option<u64>,
    pub aging_halflife_sec: Option<u64>,
}

W-TinyLFU tuning knobs (ADR 040). See CacheConfig::tinylfu.

Fields

sketch_bytes: Option<usize>

Count-min sketch size in bytes, shared by admission and eviction. Absent => crate::config::DEFAULT_TINYLFU_SKETCH_BYTES (262144). Larger sketches reduce frequency-estimate collisions at the cost of more resident memory.

promotion_threshold: Option<u32>

Prior sightings a probation member needs before promotion to the main segment. Absent => crate::config::DEFAULT_TINYLFU_PROMOTION_THRESHOLD (2).

probation_target_pct: Option<u64>

Percent of cache.cache_size_mb the probation segment is capped to. Absent => crate::config::DEFAULT_TINYLFU_PROBATION_TARGET_PCT (10). Hard bounds [1, 50].

aging_halflife_sec: Option<u64>

Reserved: half-life in seconds for aging the frequency sketch. Absent => crate::config::DEFAULT_TINYLFU_AGING_HALFLIFE_SEC (600). Currently resolved and stored but not consulted — the shipped sketch ages on a fixed observation-count window rather than a wall-clock half-life.

Trait Implementations

impl Debug for TinyLfuConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for TinyLfuConfig

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for TinyLfuConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for TinyLfuConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.