Struct RetentionStats 

pub struct RetentionStats {
    pub budget: RetentionBudget,
    pub retained: usize,
    pub retained_bytes: usize,
    pub span: Duration,
    pub evicted: u64,
    pub expired: u64,
}

What the ring holds and what its bounds have cost, as of one read.

All Copy: the monitor hands this out per stats tick, and a snapshot that allocated would contend with the ingest path for nothing.

Fields

budget: RetentionBudget

The budget in force — the banner states it (#217).

retained: usize

Samples currently retained.

retained_bytes: usize

Accounted bytes currently retained.

span: Duration

Oldest retained sample → newest, on the arrival clock. Zero when fewer than two samples are held. When RetentionStats::evicted is non-zero this is shorter than budget.max_age claims — which is why both ride together.

evicted: u64

Samples dropped because the byte budget bit (O6: the bound’s cost). Counted apart from RetentionStats::expired, from broadcast lag, and from both stats-table populations — v1.18 R1 forbids the fold.

expired: u64

Samples that aged past budget.max_age — the window sliding as declared.

Trait Implementations

impl Clone for RetentionStats

fn clone(&self) -> RetentionStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RetentionStats

impl Debug for RetentionStats

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

Formats the value using the given formatter.

impl Eq for RetentionStats

impl PartialEq for RetentionStats

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for RetentionStats