Pretty much self explanatory. I was sending some message and it sent the error that the message was too big. What is the maximum message size?
1 Answers
It depends upon the message transport, each has its own limitations on message size.
From a guidance perspective, messages over 64k can really slow down broker performance, messages over 256k are a definite no for many systems.
| Transport | Limit |
|---|---|
| RabbitMQ | unlimited |
| Azure Service Bus | 256 KB for standard, 1 MB for premium |
| ActiveMQ | unlimited |
| SQS | 256 KB |
| Kafka | 1 MB |
| Azure Event Hub | 1 MB |
Larger messages will affect overall system performance, so keep that in mind. For instance, putting 1 MB messages in RabbitMQ will significantly hurt performance, even more so if using HA/quorum queues.
MassTransit supports the claim check pattern via Message Data to store large payloads outside of the message body.
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