Momento Topics service quotas
These limits can be adjusted. Before requesting an increase, please ensure that your account has a registered payment method. You can then request an increase by contacting us.
Limits
| Resource | Entity | Default | ||
|---|---|---|---|---|
| Soft limits | ||||
| Namespace count | region | 3 | ||
| Operations per second | region | 10 | ||
| Concurrent subscriptions | region | 100 | ||
| Number of webhooks | namespace | 5 | ||
| Message delivery per second | webhook | 5 | ||
| Hard limits | ||||
| Payload size | message | 4 KB | ||
| Delivery timeout | webhook | 5 seconds | ||
| Operations per second (control APIs) | region | 5 | ||
We can handle millions of concurrent operations/second and subscriptions. Please contact us for more information.
Operations
Each message published to Momento Topics counts as a single operation. Every message delivered counts as an additional operation. A topic with 9 subscribers would result in 10 operations for every message published: one for the publish and one for each subscription.
Messages are billed in 1 KB chunks. A .5 KB published message will be charged 1 operation. However, a 1.4 KB message will be charged 2 operations.
Examples
Message broadcast
A .1 KB message is published to a topic that has 9 subscribers.
1 message published + 9 subscribers = 10 operations
Large direct message
A 4 KB message is published to a topic that has a single subscriber.
(4 KB / 1 KB chunk) x 1 subscriber = 4 operations