Momento Topics service quotas
Service quotas are directly affected by the support plan on your account. Both soft and hard limits are increasable for the Pro tier and Enterprise plans. If you would like to request an increase, please contact sales.
Limits
| Resource | Entity | Default | Basic support | Pro support |
|---|---|---|---|---|
| Soft limits | ||||
| Namespace count | region | 3 | 30 | 300 |
| Operations per second | namespace | 10 | 100 | 1,000 |
| Concurrent connections | namespace | 100 | 1,000 | 10,000 |
| Number of webhooks | namespace | 10 | 100 | 1,000 |
| Message delivery per second | webhook | 50 | 500 | 5,000 |
| Hard limits | ||||
| Payload size | message | 4 KB | ||
| Delivery timeout | webhook | 5 seconds | ||
| Operations per second (control APIs) | region | 5 | ||
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