databendlabs / openraft / 20205132107

88%

Build Type

push

github

Committed by drmingdrmer

Commit Message

feat: add `runtime-stats` feature flag for runtime statistics access

Add a feature flag that exposes runtime statistics types (`RuntimeStats`,
`SharedRuntimeState`, `Histogram`) via the `stats` module, allowing
applications to monitor Raft operational metrics like batch sizes.

This feature is **unstable** and the API may change in future versions.

Changes:
- Add `Histogram` with logarithmic bucketing and bucket index cache for small values
- Add `RuntimeStats` tracking `apply_batch` and `append_batch` histograms
- Add `SharedRuntimeState` as `Arc<Mutex<RuntimeStats>>` wrapper for cross-component sharing
- Add `RuntimeStats::display()` returning `RuntimeStatsDisplay` with precomputed percentiles
- Add `PercentileStats` with `total`, `p50`, `p90`, `p99` fields
- Add `Raft::runtime_stats()` method gated by `runtime-stats` feature
- Export types from `crate::stats` module when feature is enabled

Run Details

114 of 129 new or added lines in 5 files covered. (88.37%)

1 existing line in 1 file now uncovered.

14356 of 15481 relevant lines covered (92.73%)

153673.93 hits per line