How does Sidekiq really work?
notes
reading the code is the way to understand a codebase (and the tools we come to rely on).
with that said, it can be arduous, require multiple readings and it may not be clear where to start.
this walk through approach was both fun and helpful. i wouldn't mind all codebases coming with such a resource (along with a flow diagram of the function calls and another one for the code layout).
i appreciated some of the commentary as well, including the notes about the 25s timeout.
link
summary
This article delves into the internals of Sidekiq to highlight its key aspects, design and implementation decisions by diving directly into the source code and following a job through its full lifecycle. It covers booting up, signal handling, queue processing, retrying & scheduling, and job loss potential.