This article is a part of CQK Top 10 series. Modern applications process their work in multiple thread pools. Knowing where they are and how to set them up correctly is crucial for making sure applications behave well in production. We observe that stability and peformance issues are often a result of mistakes in this area.

The story begins two years ago during an excellent TDD training given by Szczepan Faber and Tomek Kaczanowski for a bunch of Allegro developers. Surprisingly, it was a trigger to revolutionize our builds at Allegro.

At Allegro, we always try to pick the right tool for the job. As a result, despite focusing on JVM for implementing our services, we do use Python extensively for infrastructure automation and management.