module Sidekiq::Metrics::Histogram

Defined in:

sidekiq/metrics/histogram.cr

Constant Summary

BUCKET_BOUNDARIES = begin boundaries = [] of Float64 value = 20.0 17.times do boundaries << value value = (value * 1.5).round(0) end boundaries end

Bucket boundaries in milliseconds Each boundary represents the upper limit of the previous bucket Bucket 0: 0-20ms Bucket 1: 20-30ms (20 * 1.5) Bucket 2: 30-45ms (30 * 1.5) ... and so on with 1.5x exponential scaling

BUCKET_COUNT = 18

Number of histogram buckets

BUCKET_FIELDS = {"h0", "h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8", "h9", "h10", "h11", "h12", "h13", "h14", "h15", "h16", "h17"}

Pre-allocated bucket field names for Redis storage This eliminates string interpolation overhead during metrics recording

Class Method Summary

• .bucket_field(bucket_index : Int32) : String

  Get the bucket field name for Redis storage Returns pre-allocated string to avoid allocations in hot path

• .bucket_for(duration_ms : Float64) : Int32

  Find the appropriate bucket index for a given duration in milliseconds Returns 0 for fastest jobs, up to BUCKET_COUNT-1 for slowest

Class Method Detail