Struct Counters 

pub struct Counters {

    pub stat_fetch_failures: AtomicU64,
    pub usn_batches_truncated: AtomicU64,
    pub snapshot_load_failures: AtomicU64,
    pub snapshot_save_failures: AtomicU64,
    pub deferred_names_unresolved: AtomicU64,
    pub corrupt_mft_records: AtomicU64,
    pub journal_rescans: AtomicU64,
    pub scan_pipeline_fallbacks: AtomicU64,
    pub compaction_aborts: AtomicU64,
    pub pipe_malformed_frames: AtomicU64,
    pub pipe_events_dropped: AtomicU64,
    pub pipe_connections_rejected: AtomicU64,
    pub deferred_name_cache_overflow: AtomicU64,
    pub deferred_name_read_failures: AtomicU64,
    pub pipe_results_evicted: AtomicU64,
    pub trace_serialize_failures: AtomicU64,
    pub walk_read_errors: AtomicU64,
    pub walk_depth_truncated: AtomicU64,
}

Degradation counters — “this happened N times” facts that would otherwise vanish into fallback paths. Zero-cost atomics, always on.

Fields

stat_fetch_failures: AtomicU64

Times a per-entry size/mtime stat fetch failed.

usn_batches_truncated: AtomicU64

Times a USN batch was truncated (records dropped before apply).

snapshot_load_failures: AtomicU64

Times a snapshot failed to load (fell back to a full scan).

snapshot_save_failures: AtomicU64

Times a snapshot failed to save.

deferred_names_unresolved: AtomicU64

Times a deferred $ATTRIBUTE_LIST name could not be resolved.

corrupt_mft_records: AtomicU64

Times a corrupt MFT record was encountered and skipped.

journal_rescans: AtomicU64

Times the USN journal was rescanned from scratch (gap recovery).

scan_pipeline_fallbacks: AtomicU64

Times the scan pipeline fell back to a slower path.

compaction_aborts: AtomicU64

A compacted copy was discarded because the index mutated under it — impossible while the volume thread is the only writer; nonzero means that invariant broke somewhere.

pipe_malformed_frames: AtomicU64

Pipe server (fmf-service): a frame failed validation and the connection was dropped.

pipe_events_dropped: AtomicU64

Pipe server: a subscriber’s bounded event queue overflowed and the oldest event was dropped.

pipe_connections_rejected: AtomicU64

Pipe server: a client was turned away at the instance cap.

deferred_name_cache_overflow: AtomicU64

Scan: the extension-record name cache hit its capacity; remaining deferred names fall back to per-record disk reads.

deferred_name_read_failures: AtomicU64

Scan: a deferred-name disk read failed (the entry keeps a placeholder name until the next rescan).

pipe_results_evicted: AtomicU64

Pipe server: a result handle was LRU-evicted at the per-connection cap; its next page fetch answers STALE(“evicted”).

trace_serialize_failures: AtomicU64

QueryTrace JSON serialization failed; the response carried an empty trace (the query itself succeeded).

walk_read_errors: AtomicU64

Scope walk (ADR-0024): paths skipped because they could not be read (permission denied or vanished mid-walk) — silent data loss otherwise.

walk_depth_truncated: AtomicU64

Scope walk: subtrees not descended because they hit the depth cap.

Implementations

impl Counters

pub fn bump(counter: &AtomicU64)

Increment a counter by one (relaxed atomic).

pub(crate) fn bump_offset_table_rebuild_fallbacks()

pub(crate) fn bump_lazy_perm_rebuild_fallbacks()

pub fn add(counter: &AtomicU64, n: u64)

Add n to a counter (relaxed atomic).

pub fn snapshot(&self) -> CountersSnapshot

Read all counters into a plain-integer CountersSnapshot.

Trait Implementations

impl Debug for Counters

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

Formats the value using the given formatter.

impl Default for Counters

fn default() -> Counters

Returns the “default value” for a type.