Limits and pricing
Message and setting limits, per-plan queue, schedule and storage allowances, and how queue operations are counted and priced.
Queues are billed by operation, and your plan sets how many queues and schedules an environment holds and how much queued data your organization keeps. Every other limit is the same on all plans.
Pricing
The first 1,000,000 queue operations each month are included. After that, operations cost €0.40 per million.
| Action | Operations |
|---|---|
| Send a message | 1 per started 64 KiB of the body |
| Deliver a push message, or receive a pull message | 1 per started 64 KiB, per delivery |
| Acknowledge, retry or extend a received message | 1 |
| Acknowledge a batch of received messages | 1 per started 10 acknowledged |
| Settle a push delivery, by any response | Free |
| Create, list, browse or change queues and schedules | Free |
A message under 64 KiB delivered on its first try therefore costs two operations through a push queue and three through a pull queue, or a little over two when it is acknowledged in a batch, as consume does. Retries add one delivery each. Queue operations appear under Usage in the console, next to your other metered resources.
Plan allowances
| Plan | Queues per environment | Schedules per environment | Queued data per organization |
|---|---|---|---|
| Starter | 25 | 10 | 25 MiB |
| Pro | 500 | 250 | 256 MiB |
| Enterprise | No limit | No limit | 1 GiB |
Queued data counts the bodies of every message your organization holds, dead letters included. When it is full, sends answer 429 backlog_full until messages are processed, expire or are deleted. The same answer, with a message saying the queue service is at capacity, protects every organization if the platform's own storage fills; retry it after a short wait. Creating a queue past the plan's count answers 429 quota_exceeded.
Message limits
| Limit | Value |
|---|---|
| Message body | 1 MiB |
| Messages per batch send | 100, with at most 4 MiB of bodies |
| Headers per message | 32, each value up to 1,024 characters |
| Ordering group key | 128 characters |
| Deduplication key | 256 characters |
| Delay or scheduled time | Up to one year ahead |
| Messages per receive | 100 |
| Messages per batch ack | 100 |
| Long-poll wait | 20 seconds |
Queue settings
| Setting | Default | Range |
|---|---|---|
| Visibility timeout | 60 seconds | 1 second to 12 hours |
| Retention | 4 days | 1 minute to 14 days |
| Maximum attempts | 10 | 1 to 100 |
| Retry backoff | 5 seconds, doubling to 15 minutes | 0 seconds to 1 day each |
| Deduplication window | 24 hours | Up to 7 days |
| Push concurrency | 100 | 1 to 1,000 |
A message that is not processed within its retention period is deleted, whether or not it was ever delivered.