Sidekiq for Ruby on Rails: Setup, Jobs & Monitoring (2026)
Sidekiq is a background job framework for Ruby that processes jobs concurrently on threads, backed by Redis. In Rails, add gem "sidekiq", set config.active_job.queue_adapter = :sidekiq, enqueue with perform_async, and run the sidekiq process alongside your app server. Sidekiq 8 requires Ruby 3.2+ and Redis 7+. That answer covers the mechanics.