SQS Limits, Security, and Monitoring

Learn about SQS limits, scalability, security, and monitoring.

Limits

  • In-flight messages are messages that have been picked up by a consumer but have not yet been deleted from the queue.
  • Standard queues have a limit of 120,000 in-flight messages per queue.
  • FIFO queues have a limit of 20,000 in-flight messages per queue.
  • FIFO queues support up to 3000 messages per second when batching or 300 per second otherwise.
  • Queue names can be up to 80 characters.
  • Messages are retained and can be retained for up to 4 days by default up to 14 days.
  • The maximum message size is 256KB.

Level up your interview prep. Join Educative to access 70+ hands-on prep courses.