Struct CacheMetrics 

#[non_exhaustive]
pub struct CacheMetrics {

    pub hits: u64,
    pub misses: u64,
    pub evictions: u64,
    pub expired: u64,
    pub insertions: u64,
    pub collisions: u64,
    pub pending_cached: u64,
    pub pending_replayed: u64,
    pub pending_dropped: u64,
    pub pending_replay_failed: u64,
    pub template_store_restored: u64,
    pub template_store_codec_errors: u64,
    pub template_store_backend_errors: u64,
}

A point-in-time snapshot of cache metrics.

This provides a consistent view of metrics without requiring atomic operations for each field access.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

hits: u64

Number of successful template lookups (cache hits)

misses: u64

Number of failed template lookups (cache misses)

evictions: u64

Number of templates evicted due to LRU policy

expired: u64

Number of templates that expired due to TTL

insertions: u64

Number of template insertions (including replacements)

collisions: u64

Number of template ID collisions (same ID, different definition)

pending_cached: u64

Number of flows cached as pending (awaiting template)

pending_replayed: u64

Number of pending flows successfully replayed after template arrived

pending_dropped: u64

Number of pending flows dropped (expired or evicted)

pending_replay_failed: u64

Number of pending flows that failed to replay (parse error after template arrived)

template_store_restored: u64

Number of templates restored from the secondary TemplateStore on a primary-cache miss.

template_store_codec_errors: u64

Number of secondary TemplateStore payloads that failed to decode (corrupted entry, wire-format mismatch, or buggy backend).

template_store_backend_errors: u64

Number of secondary-store get/put/remove calls that returned Err.

Implementations

impl CacheMetrics

pub fn hit_rate(&self) -> Option<f64>

Calculate the cache hit rate (0.0 to 1.0)

Returns None if there have been no lookups yet.

pub fn miss_rate(&self) -> Option<f64>

Calculate the cache miss rate (0.0 to 1.0)

Returns None if there have been no lookups yet.

pub fn total_lookups(&self) -> u64

Total number of template lookups (hits + misses)

Trait Implementations

impl Clone for CacheMetrics

fn clone(&self) -> CacheMetrics

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for CacheMetrics

impl Debug for CacheMetrics

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

Formats the value using the given formatter.

impl Eq for CacheMetrics

impl PartialEq for CacheMetrics

fn eq(&self, other: &CacheMetrics) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CacheMetrics