• Help!
• Threading
• Use only thread-safe libraries!
• Thread-unsafe gems, do not use:
• Writing thread-safe code
• Executing child processes
• Add Timeouts to Everything
• Autoloading
• Job status polling works in development, not in production
• "Cannot find ModelName with ID=12345"
• Heroku "ERR max number of clients reached"
• Sidekiq Web is not reachable, and Rails returns an ActionController::RoutingError
• Sending email leads to lots of "stuck" jobs on the Busy tab
• The threads are not processing jobs
• Cannot get database connection within 5.00 seconds
• Postgres connection corruption
• My Sidekiq process is disappearing!?
• My Sidekiq process is crashing, what do I do?
• Jobs are mysteriously disappearing or failing without anything in the logs!
• Why isn't Sidekiq using all of the available cores?
• Memory bloat
• ActiveRecord queries
• ActiveRecord query cache
• Memory Fragmentation
• Debugging Memory Bloat
• Frozen Processes
• Fixed race condition in heartbeat which could rarely lead to lingering processes on the Busy tab. [#2982]
• Bundler cannot fetch specs
• No leak issues please