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ViewMetrics

laminar_db::engine_metrics

Struct ViewMetrics 

Source 
pub struct ViewMetrics {
    pub updates: IntCounter,
    pub bytes_stored: IntGauge,
    pub committed_staleness_ms: IntGauge,
    pub freshness_breaches_total: IntCounterVec,
    pub rows_below_horizon_total: IntCounter,
    pub reads_total: IntCounterVec,
    pub committed_read_age_seconds: Histogram,
    pub recent_read_wait_seconds: Histogram,
    pub recency_probe_failures_total: IntCounterVec,
}
Expand description

Materialized view results and the freshness of committed view reads.

Fields§

§updates: IntCounter

Materialized view updates.

§bytes_stored: IntGauge

Approximate MV bytes stored.

§committed_staleness_ms: IntGauge

Age of the newest committed checkpoint, which committed view reads observe.

§freshness_breaches_total: IntCounterVec

Times a view’s committed reads became staler than its declared freshness. Label: view.

§rows_below_horizon_total: IntCounter

Rows append-only views dropped at ingest because they arrived behind the event-time retention horizon. A row-cap retention has no horizon and never drops here.

§reads_total: IntCounterVec

Ad-hoc reads of views. Label: level (latest, committed or recent).

§committed_read_age_seconds: Histogram

Age of the committed checkpoint each committed or recent read observed, in seconds.

§recent_read_wait_seconds: Histogram

How long each recent read waited for a committed checkpoint holding what its sources had upstream when it arrived, in seconds.

§recency_probe_failures_total: IntCounterVec

Times a source could not report its upstream position to a recent read. Label: source.

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