Struct Metrics

pub struct Metrics {Show 36 fields
    pub records: u64,
    pub log_bytes: u64,
    pub flushes: u64,
    pub inline_flushes: u64,
    pub flushed_records: u64,
    pub flush_us_total: u64,
    pub steps_run: u64,
    pub steps_replayed: u64,
    pub runs_started: u64,
    pub runs_finished: u64,
    pub runs_parked: u64,
    pub parked_entries: u64,
    pub run_table_bytes: u64,
    pub loaded_bytes: u64,
    pub open_store_frames: u64,
    pub open_store_bytes: u64,
    pub open_us: u64,
    pub budget_parks: u64,
    pub object_compactions: u64,
    pub journal_frames_read: u64,
    pub journal_bytes_read: u64,
    pub runs_loaded: u64,
    pub checkpoints: u64,
    pub index_bases_built: u64,
    pub determinism_errors: u64,
    pub busy: u64,
    pub gate_waits: u64,
    pub gate_wait_us_total: u64,
    pub stalls: u64,
    pub max_tick_us: u64,
    pub max_flush_us: u64,
    pub volatile_timers: u64,
    pub log_writes: u64,
    pub log_device_bytes: u64,
    pub log_rolls: u64,
    pub log_owner: u64,
}

Expand description

Counters, per shard. Cheap to copy; exported by the engine.

Fields§

§records: u64§log_bytes: u64§flushes: u64§inline_flushes: u64§flushed_records: u64§flush_us_total: u64§steps_run: u64§steps_replayed: u64§runs_started: u64§runs_finished: u64§runs_parked: u64

Number of times a live workflow was parked since opening the engine.

§parked_entries: u64

Current run-store index entries, including completed entries retained on disk.

§run_table_bytes: u64

Heap bytes of the run table (every run’s entry and its indexes).

§loaded_bytes: u64

Bytes of run state held in memory by loaded runs (an estimate; see [RuntimeConfig::memory_budget]).

§open_store_frames: u64

The last open: run store frames and bytes it read (the persisted index, or every frame of the store prefix when it had none), and how long it took.

§open_store_bytes: u64§open_us: u64§budget_parks: u64

Runs parked early because loaded state exceeded the memory budget.

§object_compactions: u64

Keys of object types continued as new with a snapshot of their state (see crate::object).

§journal_frames_read: u64

Run store frames read to rebuild journals (a parked run’s newest frame and the Delta frames it extends), and their bytes.

§journal_bytes_read: u64§runs_loaded: u64§checkpoints: u64§index_bases_built: u64

Index bases written a frame at a time between checkpoints and then named by one (see [Inner::write_index]).

§determinism_errors: u64§busy: u64§gate_waits: u64§gate_wait_us_total: u64§stalls: u64

Ticks and flushes over the stall threshold (see [Stall]).

§max_tick_us: u64

Longest tick and flush seen while stall tracing is on.

§max_flush_us: u64§volatile_timers: u64

Current volatile timers (step timeouts, heartbeat timeouts, retry backoff), including cancelled ones the timer heap still holds.

§log_writes: u64

The shared log’s writes to its device, the bytes they put there (headers and padding included; against log_bytes, the records’), and its segment rolls, since it opened. One shard of a log reports them, so a sum over shards counts each once.

§log_device_bytes: u64§log_rolls: u64§log_owner: u64

1 when the shared log’s owner thread writes (Linux, io_uring).