Concurrency, Understanding the BEAM Limits

Presented by: Lorena Mireles Rivero

About this talk

Modern systems can accept enormous amounts of concurrent work, but that doesn’t mean they can process it sustainably.

In her latest session, Lorena Mireles Rivero explores how concurrency works inside the BEAM and where real system limits begin to appear. Using practical examples from modern web applications and e-commerce platforms, she explains how schedulers, mailboxes, CPU usage, and latency interact under heavy load.

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The talk examines how the Erlang Runtime System manages execution, why bottlenecks happen even in highly concurrent systems, and what teams can do to design systems that remain stable under pressure.

What you’ll learn:

  • How concurrency is executed inside the BEAM
  • The difference between concurrency and sustainable throughput
  • Common signs of system saturation and overload
  • How to use workload distribution, back pressure, and graceful degradation effectively

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