Method collection_mem_usage

nodedb/src/engine/kv/engine_stats.rs:128–134

Approximate memory usage for a specific collection. Sums the hash table's own `mem_usage()` estimate; returns 0 if no table exists for `(tenant_id, collection)`.

(&self, tenant_id: u64, collection: &str)

    /// hash table's own `mem_usage()` estimate; returns 0 if no table
    /// exists for `(tenant_id, collection)`.
    pub fn collection_mem_usage(&self, tenant_id: u64, collection: &str) -> u64 {
        let tkey = table_key(tenant_id, collection);
        self.tables
            .get(&tkey)
            .map(|t| t.mem_usage() as u64)
            .unwrap_or(0)
    }

    /// Comprehensive observability snapshot for this KV engine.
    pub fn stats(&self) -> KvStats {