kmx.io/kmxgit/lib/kmxgit_web/telemetry.ex

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• Hash : 043fd38d
  Author : Thomas de Grivel
  Date : 2021-11-02T16:10:03
  

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• lib/kmxgit_web/telemetry.ex

• defmodule KmxgitWeb.Telemetry do
    use Supervisor
    import Telemetry.Metrics
  
    def start_link(arg) do
      Supervisor.start_link(__MODULE__, arg, name: __MODULE__)
    end
  
    @impl true
    def init(_arg) do
      children = [
        # Telemetry poller will execute the given period measurements
        # every 10_000ms. Learn more here: https://hexdocs.pm/telemetry_metrics
        {:telemetry_poller, measurements: periodic_measurements(), period: 10_000}
        # Add reporters as children of your supervision tree.
        # {Telemetry.Metrics.ConsoleReporter, metrics: metrics()}
      ]
  
      Supervisor.init(children, strategy: :one_for_one)
    end
  
    def metrics do
      [
        # Phoenix Metrics
        summary("phoenix.endpoint.stop.duration",
          unit: {:native, :millisecond}
        ),
        summary("phoenix.router_dispatch.stop.duration",
          tags: [:route],
          unit: {:native, :millisecond}
        ),
  
        # Database Metrics
        summary("kmxgit.repo.query.total_time",
          unit: {:native, :millisecond},
          description: "The sum of the other measurements"
        ),
        summary("kmxgit.repo.query.decode_time",
          unit: {:native, :millisecond},
          description: "The time spent decoding the data received from the database"
        ),
        summary("kmxgit.repo.query.query_time",
          unit: {:native, :millisecond},
          description: "The time spent executing the query"
        ),
        summary("kmxgit.repo.query.queue_time",
          unit: {:native, :millisecond},
          description: "The time spent waiting for a database connection"
        ),
        summary("kmxgit.repo.query.idle_time",
          unit: {:native, :millisecond},
          description:
            "The time the connection spent waiting before being checked out for the query"
        ),
  
        # VM Metrics
        summary("vm.memory.total", unit: {:byte, :kilobyte}),
        summary("vm.total_run_queue_lengths.total"),
        summary("vm.total_run_queue_lengths.cpu"),
        summary("vm.total_run_queue_lengths.io")
      ]
    end
  
    defp periodic_measurements do
      [
        # A module, function and arguments to be invoked periodically.
        # This function must call :telemetry.execute/3 and a metric must be added above.
        # {KmxgitWeb, :count_users, []}
      ]
    end
  end
  

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