Struct IndexStatisticsSample 

pub struct IndexStatisticsSample {
    pub index_size: u64,
    pub unique_values: u64,
    pub sample_size: u64,
    pub updates_since_sample: u64,
}

A compact, payload-free sample for one explicit property index.

index_size, unique_values, and sample_size describe one coherent sampling epoch. Mutations after that epoch only advance updates_since_sample; they never rewrite the sampled counters in place.

Fields

index_size: u64

unique_values: u64

sample_size: u64

updates_since_sample: u64

Implementations

impl IndexStatisticsSample

pub const STALE_UPDATE_PERCENT: u64 = 5

pub fn exact(index_size: u64, unique_values: u64) -> Self

pub fn is_valid(self) -> bool

pub fn max_fresh_updates(self) -> u64

pub fn is_stale(self) -> bool

pub fn estimated_unique_values(self) -> Option<u64>

Trait Implementations

impl Clone for IndexStatisticsSample

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 IndexStatisticsSample

impl Debug for IndexStatisticsSample

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

Formats the value using the given formatter.

impl Default for IndexStatisticsSample

fn default() -> Self

Returns the “default value” for a type.

impl Eq for IndexStatisticsSample

impl PartialEq for IndexStatisticsSample

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for IndexStatisticsSample