# Core Concepts

# API
- `perform`
- `perform_async`

# Gotchas
- Sidekiq will retry failed jobs by default (you can set retries to 0), so:
  - Make sure those jobs are idempotent, since they aren't transactional.
  - If you can't deploy a fix before retries stop, check the dead jobs through the Sidekiq UI and retry from there, after deploying your fix.