Summary of Metrics and Performance Expectations

Instrumenting

Elixir provides a wide range of tools to help us instrument our application to measure performance in production. The first section showed how to monitor and fine-tune Observer to ensure everything runs well in production. The Erlang Observer tool uses the same low-level APIs to collect data that we can use to instrument our own solutions. We learned how to use those APIs to measure memory usage, resources by process, and other details such as running the queue length.