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Queues100 per account 1
Maximum message size128 KB 2
Maximum message retries100
Maximum batch size100 messages
Maximum batch wait time30 seconds
Maximum per-queue message throughput 3400 messages per second 4
Maximum message retention period 54 days (96 hours)
Maximum per-queue backlog size 625GB
Maximum concurrent consumer invocations10
Maximum consumer invocation duration15 minutes 7

1 Request adjustments to limits that conflict with your project goals by contacting Cloudflare. To request an increase to a limit, complete the Limit Increase Request Form and we will contact you with next steps.

2 1 KB is measured as 1000 bytes. Messages can include up to ~100 bytes of internal metadata that counts towards total message limits.

3 The maximum message throughput per queue will continue to increase during the beta period.

4 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.

5 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.

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

7 Queues does not support remote development mode in Wrangler. wrangler dev --remote will result in an error.

8 Refer to Worker limits.