Restrictions
This section describes the restrictions on using DMS for RocketMQ.
Item |
Default Limit |
Description |
---|---|---|
Maximum number of topics |
Depends on the instance specifications. This limit cannot be changed. |
When this limit is reached, no more topics can be created. |
Maximum number of consumer groups |
Depends on the instance specifications. This limit cannot be changed. |
When this limit is reached, no more consumer groups can be created. |
Message size |
The maximum size of a message is 4 MB. The maximum size of a message attribute is 16 KB. The message size cannot be changed. |
When this limit is reached, the message fails to be sent. |
Message retention duration |
Two days. This limit cannot be changed. |
Messages can be retained for a maximum of two days and will be automatically deleted after two days. |
Consumer offset reset |
Two days. This limit cannot be changed. |
You can reset the retrieval start position to any time within two days. |
Delay of scheduled messages |
The maximum delay is one year. This limit cannot be changed. |
You can schedule messages to be delivered at any time within one year. |
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