Debugging Techniques in Elixir
summary
Starts from IO.inspect then shows when to stop printing and use IEx.pry for live process shells, :debugger for breakpoint-driven inspection, and observer crash dump plus tracing to read postmortems. Demonstrates reading scheduler reduction counts (examples: ~1k then an entry with >2,000,000 reductions), diagnosing CPU hot spots, finding memory leaks from ETS tables, dynamic atoms and oversized mailboxes, connecting a standalone observer to remote nodes and adding runtime_tools to releases.
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chapters (9)
- 0:00Introduction and background
- 4:01Debugging basics in Elixir
- 8:28Interactive debugging with Pry
- 11:30Using the visual debugger
- 13:14Erlang VM and schedulers
- 17:39Identifying bottlenecks
- 20:55Tracing and crash dumps
- 22:44Remote debugging production
- 26:10Recap and learning resources
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