SQS Limits, Security, and Monitoring
Learn about SQS limits, scalability, security, and monitoring.
We'll cover the following
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.
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