Struct HistoryLimits 

pub struct HistoryLimits {
    pub entries: usize,
    pub payload_bytes: usize,
}

Immutable bounds on row count and caller-accounted payload bytes.

Bytes are a consumer-defined charge, not a measurement of all heap memory. Consumers must bound each payload’s fields before appending and account for their retained content consistently. Inline metadata, spare capacity and allocator overhead are not automatically charged.

Fields

entries: usize

Maximum retained rows; zero disables admission.

payload_bytes: usize

Maximum sum of retained row payload charges.

Trait Implementations

impl Clone for HistoryLimits

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for HistoryLimits

impl Debug for HistoryLimits

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

Formats the value using the given formatter.

impl Eq for HistoryLimits

impl PartialEq for HistoryLimits

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for HistoryLimits