Struct ResultCacheStats 

pub struct ResultCacheStats {
    pub entries: usize,
    pub hits: u64,
    pub misses: u64,
    pub invalidations: u64,
    pub memory_bytes: usize,
    pub ttl_seconds: u64,
    pub max_entries: usize,
}

A snapshot of an adapter’s query-result cache, for the operator surface.

Exists because the admin API could see only the Arrow Flight query cache, and so answered “Cache is not configured” for a server whose sibling endpoint reported the query result cache active in the same breath (#941). An adapter that caches nothing returns None from DatabaseAdapter::result_cache_stats — “no such cache” and “a cache holding zero entries” are different answers and the endpoint must not conflate them.

Fields

entries: usize

Entries currently held.

hits: u64

Lookups served from cache.

misses: u64

Lookups that reached the database.

invalidations: u64

Invalidations performed (mutation sweeps, entity evictions, admin clears).

memory_bytes: usize

Estimated memory held, in bytes.

ttl_seconds: u64

Configured default entry TTL, in seconds.

max_entries: usize

Configured entry ceiling.

Trait Implementations

impl Clone for ResultCacheStats

fn clone(&self) -> ResultCacheStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ResultCacheStats

impl Debug for ResultCacheStats

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

Formats the value using the given formatter.

impl Default for ResultCacheStats

fn default() -> ResultCacheStats

Returns the “default value” for a type.

impl Eq for ResultCacheStats

impl PartialEq for ResultCacheStats

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ResultCacheStats