custom metrics dashboard on AppSignal

-
  title: 'Sidekiq Queues'
  graphs:
    -
      title: 'Sidekiq Queue count'
      kind: count
      filter: queue_(.+)_count
      format: number
    -
      title: 'Sidekiq Queue durations'
      kind: measurement
      filter: queue_(.+)_duration
      format: duration

sidekiq.rb

class SidekiqQueuePlugin
  def call(worker, item, queue)
    # Get time before the job in unix epoch float
    before = Time.now.to_f
    
    # Run the job
    yield

    # Get time after the job in unix epoch float
    after = Time.now.to_f

    # Count the number of jobs
    Appsignal.increment_counter("queue_#{queue}_count", 1)

    # Measure the time it took for the job to complete.
    # (end - start) * 1000 to convert unix epoch float to miliseconds
    Appsignal.add_distribution_value("queue_#{queue}_duration", (after - before) * 1000)
  end
end

# Add plugin to Sidekiq middleware
::Sidekiq.configure_server do |config|
  config.server_middleware do |chain|
    chain.add SidekiqQueuePlugin
  end
end