Struct LevelStats 

pub struct LevelStats {
    pub level: usize,
    pub segment_count: usize,
    pub used_bytes: u64,
    pub item_count: u64,
    pub reads: u64,
    pub last_access_secs: u64,
    pub segments: Vec<SegmentStats>,
}

Per-LSM-level size + entry aggregates with the contributing segments, for tiering and erasure-coding placement (which level / segment is large enough to demote, EC-encode, or migrate).

Cheap to read: derived from version metadata plus one file-size stat per segment, never a data-block scan. The per-level totals reconcile with the tree-level StorageStats: summed across levels they equal the SST portion of StorageStats::used_bytes and StorageStats::item_count (blob files are tracked separately).

Fields

level: usize

LSM level index (0 is the newest / smallest level).

segment_count: usize

Number of segments (SSTs) in the level.

used_bytes: u64

Physical on-disk bytes summed across the level’s segments.

item_count: u64

Entry versions summed across the level’s segments.

reads: u64

Cumulative point-read probes summed across the level’s segments.

last_access_secs: u64

Most recent point-read probe across the level’s segments, in unix seconds, or 0 if none was ever read.

segments: Vec<SegmentStats>

Per-segment breakdown, in level (run / table) order.

Trait Implementations

impl Clone for LevelStats

fn clone(&self) -> LevelStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LevelStats

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

Formats the value using the given formatter.

impl Eq for LevelStats

impl PartialEq for LevelStats

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for LevelStats