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Specifications

Updated on 2022-08-15 GMT+08:00

RabbitMQ Instance Specifications

DMS for RabbitMQ provides single-node and cluster instances compatible with RabbitMQ 3.7.17. Table 1 and Table 2 list the specifications of RabbitMQ instances.

NOTE:
  • To ensure stability, the maximum size of a single message is 50 MB. Do not send a message larger than 50 MB.
  • In the following tables, the reference performance is represented by the number of messages (2 KB each) processed per second. In the tests, persistence and queue mirroring were not enabled. Messages were retrieved immediately after creation and were not accumulated in the queues. The data is for reference only and may differ from that in your production environment.
  • Performance is related to the queue quantity, message accumulation, number of connections, number of channels, number of consumers, queue mirroring, priority queue, message persistence, and the exchange type. Select instance specifications based on the pressure test result of the service model.
  • A maximum of 2047 channels can be opened on a connection.
Table 1 Specifications of single-node RabbitMQ instances

Instance Specifications

Reference Performance (TPS)

Queues (Recommended)

Maximum Connections

2 vCPUs | 4 GB

10,000

100

2000

4 vCPUs | 8 GB

20,000

200

3000

8 vCPUs | 16 GB

35,000

400

5000

16 vCPUs | 32 GB

45,000

800

8000

Table 2 Specifications of cluster RabbitMQ instances

Instance Specifications

Brokers

Reference Performance (TPS)

Queues (Recommended)

Maximum Connections

4 vCPUs | 8 GB

3

45,000

600

3000 x 3

5

70,000

1000

3000 x 5

7

80,000

1400

3000 x 7

8 vCPUs | 16 GB

3

85,000

1200

5000 x 3

5

110,000

2000

5000 x 5

7

120,000

2800

5000 x 7

16 vCPUs | 32 GB

3

130,000

2400

8000 x 3

5

160,000

4000

8000 x 5

7

180,000

5600

8000 x 7

Storage Space Selection

In cluster mode, RabbitMQ persists messages to disk. When creating a RabbitMQ instance, select a proper storage space size based on the estimated message size and the number of replicas in a mirrored queue, which can be maximally equal to the number of brokers in the cluster.

For example, if the estimated message size is 100 GB, the disk capacity must be at least: 100 GB x Number of mirrored replicas + 100 GB (reserved).

For single-node instances, select a storage space size based on the estimated message size and the reserved disk space.

You can change the number of brokers in a cluster, but cannot change the specifications of a single-node instance.

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