Struct DbMetrics 

pub struct DbMetrics {

    pub memory_count: u64,
    pub stores: u64,
    pub memory_loads: u64,
    pub recalls: u64,
    pub avg_store_latency_us: u64,
    pub avg_search_latency_us: u64,
    pub buffer_pool_hits: u64,
    pub buffer_pool_misses: u64,
    pub buffer_pool_evictions: u64,
    pub buffer_pool_pages: u64,
    pub storage_bytes: u64,
    pub page_count: u64,
    pub vector_index_size: u64,
    pub graph_nodes: u64,
    pub standing_rules: u64,
}

A point-in-time snapshot of engine metrics for a /metrics exporter. Cheap to take: counters are atomic loads and sizes are O(1) index/graph/page lookups, so a scrape does not scan the corpus.

Fields

memory_count: u64

Memories stored on this node.

stores: u64

Lifetime store operations (writes).

memory_loads: u64

Lifetime memories loaded from storage by id (get_memory).

recalls: u64

Lifetime recall/query operations (reads).

avg_store_latency_us: u64

EMA of recent store op latency, microseconds. 0 until the first store.

avg_search_latency_us: u64

EMA of recent hybrid-search op latency, microseconds. 0 until the first search.

buffer_pool_hits: u64

Buffer-pool page cache hits.

buffer_pool_misses: u64

Buffer-pool page cache misses (disk reads).

buffer_pool_evictions: u64

Buffer-pool CLOCK evictions.

buffer_pool_pages: u64

Frames currently holding a page.

storage_bytes: u64

On-disk data size in bytes (page_count * page size).

page_count: u64

Pages in the store.

vector_index_size: u64

Vectors in the HNSW index.

graph_nodes: u64

Nodes in the memory graph.

standing_rules: u64

Pinned standing rules (scope:always).

Trait Implementations

impl Clone for DbMetrics

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 DbMetrics

impl Debug for DbMetrics

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

Formats the value using the given formatter.

impl Default for DbMetrics

fn default() -> Self

Returns the “default value” for a type.