Struct CacheStats 

pub struct CacheStats {
    pub hits: u64,
    pub misses: u64,
    pub hit_rate: f64,
    pub size_bytes: u64,
    pub capacity_bytes: u64,
}

A point-in-time snapshot of block-cache effectiveness and occupancy.

Derived from Metrics (the cumulative hit / miss counters) plus the live block cache’s current size and capacity, so an observability consumer gets a stable owned value instead of reaching into the mutable &Arc<Metrics>. Counts are cumulative since process start (they reset on restart, like all of Metrics); derive a rate over an interval from the delta between two polls.

Fields

hits: u64

Cumulative block reads served from the block cache (all block types).

misses: u64

Cumulative block reads that missed the cache and hit disk (all block types).

hit_rate: f64

Hit rate in 0.0..=1.0 (hits / (hits + misses)); 1.0 when no block has been loaded yet (nothing has missed).

size_bytes: u64

Current weighted bytes resident in the block cache.

capacity_bytes: u64

Configured maximum bytes the block cache may hold.

Trait Implementations

impl Clone for CacheStats

fn clone(&self) -> CacheStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CacheStats

impl Debug for CacheStats

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

Formats the value using the given formatter.