Sidekiq is a full-featured background job framework for Ruby. It aims to be simple to integrate with any modern Rails application and much higher performance than other existing solutions.

Read for more info:

• Getting Started
• The Basics
• Best Practices
• Job Lifecycle
• Using Redis
• Using Dragonfly
• Error Handling
• Advanced Options
• Scheduled Jobs
• Active Job
• Logging
• Signals
• Deployment
• Monitoring
• Metrics
• API
• Middleware
• Testing
• Sharding
• Embedding
• Problems and Troubleshooting
• Related Projects - 3rd party add-ons for Sidekiq
• FAQ

Purchase Sidekiq Pro

• Batches
  • Complex Workflows
  • Really Complex Workflows
• Reliability
• Client-side Reliability
• Metrics
• Expiring Jobs
• Web UI extensions
• API extensions

Purchase Sidekiq Enterprise

• Rolling Restarts and Long-Running Jobs
• Rate Limiting
• Periodic Jobs
• Unique Jobs
• Leader Election
• Historical Metrics
• Multi-Process
• Job Argument Encryption
• Web UI Authorization

• Commercial Support
• Commercial FAQ
• Commercial collaboration

https://www.mikeperham.com has dozens of good Sidekiq blog posts with various tips and tricks.

• How Sidekiq Works
• Queue Fairness with Multi-tenancy
• Host-specific Queues
• Storing Data with Redis
• A Tour of the Sidekiq API
• Sidekiq and Request-Specific Context
• Job Iteration in Sidekiq

Next: Getting Started