Struct lsmlite_rs::LsmMetrics

pub struct LsmMetrics {
    pub write_times_s: Histogram,
    pub work_kbs: Histogram,
    pub work_times_s: Histogram,
    pub checkpoint_kbs: Histogram,
    pub checkpoint_times_s: Histogram,
}

These are the metrics exposed by the engine. This metrics are Prometheus histograms, see https://docs.rs/prometheus/latest/prometheus/struct.Histogram.html.

Fields

write_times_s: Histogram

Histogram of the time it takes to write to the database file. Due to internal database file operations, and depending on the size of the database, some write operations might have latencies in the seconds. Since this histogram is produced external to the engine, it is suggested to capture a well-space set of intervals with precision from milliseconds to up to, say, 10 seconds. The storage engine updates this histogram with precision in seconds.

work_kbs: Histogram

Histogram of the amount of data (in KBs) written during merge operations and flushing of in-memory data into the database file. This histogram is only updated in LsmMode::LsmBackgroundMerger mode. As before, a well-space set of intervals with precision between say 512 KBs and 32 MBs is recommended.

work_times_s: Histogram

Histogram of the time it takes to perform database file operations like merging segments and flushing in-memory data. As before, this histogram is updated with precision in seconds. This histogram is only updated in LsmMode::LsmBackgroundMerger mode.

checkpoint_kbs: Histogram

Histogram of the amount of data (in KBs) written during a checkpoint operation. This histogram is only updated in LsmMode::LsmBackgroundCheckpointer mode. As before, a well-space set of intervals with precision between 1 and, say, 32 MB is recommended.

checkpoint_times_s: Histogram

Histogram of the time it takes to perform checkpointing operations on the database file. This histogram is only updated in LsmMode::LsmBackgroundCheckpointer mode and with precision in seconds.

Trait Implementations

impl Clone for LsmMetrics

fn clone(&self) -> LsmMetrics

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LsmMetrics

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

Formats the value using the given formatter.