Is There a Limit on the Number of Client Connections to a Kafka Instance?

Yes. The maximum allowed number of client connections varies by instance specifications.

Table 1 Number of connections of earlier Kafka instances

Assured Bandwidth

Max. Connections

100 MB/s

3000

300 MB/s

10,000

600 MB/s

20,000

1200 MB/s

20,000
Table 2 Number of connections of later Kafka instances

Flavor

Max. Client Connections per Broker

kafka.2u4g.cluster.small

2000

kafka.2u4g.single.small

2000

kafka.2u4g.cluster

2000

kafka.2u4g.single

2000

kafka.2u4g.cluster.beta

2000

kafka.4u8g.cluster.beta

4000

kafka.4u8g.cluster

4000

kafka.8u16g.cluster

4000

kafka.12u24g.cluster

4000

kafka.16u32g.cluster

4000
Parent topic: Connections