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The AppSignal for Elixir package integrates with the Erlang VM to provide metrics not just about your app but the virtual machine it’s running in.

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Minutely probe

Since AppSignal Elixir package 1.10.1 and up a minutely probe is activated by default. Once we detect these metrics we’ll add an Intelligence dashboard to your apps. This probe will report the following metrics grouped by hostname tag:
  • erlang_io - gauge
    • Tag type:
      • input
      • output
  • erlang_schedulers - gauge
    • Tag type:
      • total
      • online
  • erlang_processes - gauge
    • Tag type:
      • limit
      • count
  • erlang_memory - gauge
    • Tag type:
      • total
      • processes
      • processes_used
      • system
      • atom
      • atom_used
      • binary
      • code
      • ets
  • erlang_atoms - gauge
    • Tag type:
      • limit
      • count
  • erlang_scheduler_utilization - gauge (since version 2.2.8)
    • Tag type:
      • normal
    • Tag id: the ID of the scheduler
  • total_run_queue_lengths - gauge (since version 1.11.0)
    • Tag type:
      • total
      • cpu
      • io

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Intelligence dashboard

When AppSignal receives these metrics, it creates the Erlang Intelligence dashboard with the following graphs. Each is grouped by hostname and type, except Scheduler utilization, which shows one line per scheduler id for normal schedulers:
Intelligence dashboard showing key Erlang VM metrics

The Erlang Intelligence dashboard in AppSignal

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Configuration

This probe listens to the hostname config option for the hostname tag added to all its metrics. If none is set it will try to detect it automatically. Use the hostname config option to set the hostname if you want to change the detected hostname.