Limits

Feature	Limit
Queues	10,000 per account
Message size	128 KB 1
Message retries	100
Maximum consumer batch size	100 messages
Maximum messages per sendBatch call	100 (or 256KB in total)
Maximum Batch wait time	60 seconds
Per-queue message throughput	5,000 messages per second 2
Message retention period 3	14 days
Per-queue backlog size 4	25GB
Concurrent consumer invocations	250 push-based only
Consumer duration (wall clock time)	15 minutes 5
Consumer CPU time	30 seconds
visibilityTimeout (pull-based queues)	12 hours
delaySeconds (when sending or retrying)	12 hours
Requests to the Queues API (incl. pulls/acks)	1200 requests / 5 mins

¹ 1 KB is measured as 1000 bytes. Messages can include up to ~100 bytes of internal metadata that counts towards total message limits.

² Exceeding the maximum message throughput will cause the send() and sendBatch() methods to throw an exception with a Too Many Requests error until your producer falls below the limit.

³ Messages in a queue that reach the maximum message retention are deleted from the queue. Queues does not delete messages in the same queue that have not reached this limit.

⁴ Individual queues that reach this limit will receive a Storage Limit Exceeded error when calling send() or sendBatch() on the queue.

⁵ Refer to Workers limits.

Need a higher limit?

To request an adjustment to a limit, complete the Limit Increase Request Form ↗. If the limit can be increased, Cloudflare will contact you with next steps.