3. Queue Mode & Worker Scaling

Configure n8n for high concurrency with Redis.

15m Lesson 3 of 5

Queue mode separates webhook reception from workflow execution, allowing you to scale workers horizontally.

Code Examples

Queue Mode Docker Compose

yaml

services:
  n8n-main:
    image: n8nio/n8n
    environment:
      - EXECUTIONS_MODE=queue
      - QUEUE_BULL_REDIS_HOST=redis
    # Main instance handles webhooks

  n8n-worker:
    image: n8nio/n8n
    command: worker
    environment:
      - EXECUTIONS_MODE=queue
      - QUEUE_BULL_REDIS_HOST=redis
    deploy:
      replicas: 3  # Scale workers

  redis:
    image: redis:7-alpine

Pro Tips

💡Start with 2–3 workers and scale based on queue depth — monitor with Redis CLI

Comprehension Quiz

Answer 2 of 2 correctly to unlock lesson completion.

1. What does queue mode separate?

2. What external service does queue mode require?

Pass the quiz above to unlock lesson completion

Previous Next Lesson

All lessons in this chapter

1. Architecture for Scale20m 2. Version Control & CI/CD15m 3. Queue Mode & Worker Scaling15m 4. Team Collaboration & Access Control15m 5. Disaster Recovery & High Availability15m