Struct MetricsConfig 

pub struct MetricsConfig {
    pub enable_backpressure: bool,
    pub enable_batch: bool,
    pub sample_rate: u32,
}

Performance metrics configuration

Controls emission of observability metrics. Disabling metrics reduces overhead in hot paths but decreases system visibility.

Example

[raft.metrics]
enable_backpressure = true
enable_batch = true
sample_rate = 1  # No sampling (record every event)

Fields

enable_backpressure: bool

Enable backpressure metrics (rejections, buffer utilization)

Tracks client request backpressure for capacity planning. Disable for absolute maximum performance in trusted environments.

Default: false

enable_batch: bool

Enable buffer length gauge (batch.buffer_length for propose and linearizable buffers)

Tracks buffer utilization for capacity planning. Disable for absolute maximum performance in trusted environments.

Default: false

sample_rate: u32

Sample rate for high-frequency gauge metrics

• 1 = record every event (no sampling)
• 10 = record 1 out of 10 events (10% sampling)
• 100 = record 1 out of 100 events (1% sampling)

Applies to: buffer_utilization, buffer_length gauges. Does NOT apply to: counters (rejections, drain/heartbeat triggers).

Default: 1 (no sampling)

Trait Implementations

impl Clone for MetricsConfig

fn clone(&self) -> MetricsConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetricsConfig

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

Formats the value using the given formatter.

impl Default for MetricsConfig

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MetricsConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for MetricsConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.