Struct HnswMemoryStats 

pub struct HnswMemoryStats {
    pub live_nodes: usize,
    pub neighbour_slots: usize,
    pub back_ref_entries: usize,
    pub vector_floats: usize,
}

What an HnswIndex is holding, in countable units rather than bytes.

Produced by HnswIndex::memory_stats. Payload only: see that method for what is deliberately not counted.

Fields

live_nodes: usize

Vectors currently indexed.

neighbour_slots: usize

Total neighbour entries across every live node’s every layer.

back_ref_entries: usize

Total entries in the reverse adjacency index.

vector_floats: usize

Total floats stored across every live node’s vector. f32s since 0.6.6: the index’s own copy is the slab’s, and the f64s stay in the store.

Implementations

impl HnswMemoryStats

pub fn bytes_per_node(&self) -> f64

Payload bytes per indexed vector: adjacency (4 B per entry, forward and reverse) plus the index’s own copy of the vector (4 B per dimension — the store’s f64 copy is not the index’s business). Zero for an empty index.

pub fn adjacency_bytes_per_node(&self) -> f64

The adjacency half of Self::bytes_per_node — the half the index shape controls. The vector half is fixed by the embedding’s dimension.

Trait Implementations

impl Clone for HnswMemoryStats

fn clone(&self) -> HnswMemoryStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for HnswMemoryStats

impl Debug for HnswMemoryStats

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

Formats the value using the given formatter.

impl Default for HnswMemoryStats

fn default() -> HnswMemoryStats

Returns the “default value” for a type.

impl Eq for HnswMemoryStats

impl PartialEq for HnswMemoryStats

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for HnswMemoryStats