processors:
  rolling_span_latency:
    # Span attribute written once a baseline has warmed up.
    attribute_key: latency.category

    # Resource attributes combined with the span name to form each baseline's key.
    resource_key_attributes:
      - service.namespace
      - service.name
      - deployment.environment.name

    # How quickly the rolling mean/variance forgets older observations.
    half_life: 2h

    # How long a baseline can go without an observation before it is evicted.
    idle_timeout: 8h

    # How often the processor scans for and evicts idle baselines.
    eviction_interval: 10m

    # Standard deviations above the rolling mean to label a span "slow".
    slow_threshold: 3.0

    # Standard deviations above the rolling mean to label a span "very_slow".
    very_slow_threshold: 4.0

    # Fraction of baselines evicted in one sweep above which a high-cardinality warning is logged.
    churn_warning_ratio: 0.5

    # Floor applied to a baseline's rolling standard deviation.
    min_stddev: 1ms

    # Maximum number of concurrently tracked baselines (0 = unlimited).
    max_baselines: 1000

    # Observations a baseline must accumulate before spans are labeled against it.
    warmup_count: 30