Rails 8's Solid Queue: A Deep Dive into the New Background Job Processor (Part 1)
Rails 8 introduces Solid Queue, a novel background job processing library that eliminates the need for external services like Redis. This article delves into Solid Queue's architecture, explaining the interplay between Jobs and Workers and how database tables (solid_queue_jobs, solid_queue_ready_executions, solid_queue_claimed_executions, solid_queue_processes) manage job queuing, execution, and monitoring. Solid Queue achieves high performance and reliability through clever database design and the use of FOR UPDATE SKIP LOCKED statements, employing a supervisor process to prevent job loss. The article also highlights SQLite limitations and AppSignal's performance monitoring capabilities, promising a deeper dive in part two.
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