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ApsaraMQ for Kafka:Free topic and partition quotas for legacy by-topic instances

Last Updated:Mar 11, 2026

As of August 26, 2022, ApsaraMQ for Kafka no longer supports purchasing instances based on topic specifications.

Important

As of August 26, 2022, ApsaraMQ for Kafka no longer supports purchasing instances by topic. The quotas on this page apply only to instances purchased before that date. For the current purchasing model, see Billing overview.

Each ApsaraMQ for Kafka instance purchased by topic includes a set number of free topics and partitions, determined by the traffic specification and edition. The following tables list these quotas for all supported traffic specifications across three edition and performance mode combinations:

  • Standard Edition (High Write) -- 5 traffic specifications

  • Professional Edition (High Write) -- 16 traffic specifications

  • Professional Edition (High Read) -- 16 traffic specifications

Traffic specifications define the maximum read and write throughput of the elastic network interfaces (ENIs) attached to the instance. Higher traffic specifications include more free topics and partitions.

Standard Edition (High Write)

Traffic specificationMax ENI read traffic (MB/s)Max ENI write traffic (MB/s)Free topicsFree partitions
alikafka.nhw.2xlarge3 × 203 × 2050400
alikafka.nhw.3xlarge3 × 303 × 3050500
alikafka.nhw.6xlarge3 × 603 × 6080600
alikafka.nhw.9xlarge3 × 903 × 90100800
alikafka.nhw.12xlarge3 × 1203 × 120150900

Professional Edition (High Write)

Traffic specificationMax ENI read traffic (MB/s)Max ENI write traffic (MB/s)Free topicsFree partitions
alikafka.hw.2xlarge3 × 203 × 20501,100
alikafka.hw.3xlarge3 × 303 × 30501,200
alikafka.hw.6xlarge3 × 603 × 60801,400
alikafka.hw.9xlarge3 × 903 × 901001,600
alikafka.hw.12xlarge3 × 1203 × 1201501,800
alikafka.hw.16xlarge3 × 1603 × 1601802,000
alikafka.hw.20xlarge3 × 2003 × 2002002,200
alikafka.hw.25xlarge3 × 2503 × 2502502,500
alikafka.hw.30xlarge3 × 3003 × 3003003,000
alikafka.hw.60xlarge3 × 6003 × 6004504,500
alikafka.hw.80xlarge3 × 8003 × 8005005,000
alikafka.hw.100xlarge3 × 1,0003 × 1,0006006,000
alikafka.hw.120xlarge3 × 1,2003 × 1,2007007,000
alikafka.hw.150xlarge3 × 1,5003 × 1,5008008,000
alikafka.hw.180xlarge3 × 1,8003 × 1,8009009,000
alikafka.hw.200xlarge3 × 2,0003 × 2,0001,00010,000

Professional Edition (High Read)

Professional Edition (High Read) instances use an asymmetric throughput model: read traffic is higher than write traffic for the same specification tier. This suits workloads with a high consumer-to-producer ratio.

Traffic specificationMax ENI read traffic (MB/s)Max ENI write traffic (MB/s)Free topicsFree partitions
alikafka.hw.2xlarge50 + 2 × 1010 + 2 × 10501,100
alikafka.hw.3xlarge75 + 2 × 1515 + 2 × 15501,200
alikafka.hw.6xlarge150 + 2 × 3030 + 2 × 30801,400
alikafka.hw.9xlarge180 + 2 × 4545 + 2 × 451001,600
alikafka.hw.12xlarge240 + 2 × 6060 + 2 × 601501,800
alikafka.hw.16xlarge240 + 2 × 8080 + 2 × 801802,000
alikafka.hw.20xlarge300 + 2 × 100100 + 2 × 1002002,200
alikafka.hw.25xlarge375 + 2 × 125125 + 2 × 1252502,500
alikafka.hw.30xlarge450 + 2 × 150150 + 2 × 1503003,000
alikafka.hw.60xlarge900 + 2 × 300300 + 2 × 3004504,500
alikafka.hw.80xlarge1,200 + 2 × 400400 + 2 × 4005005,000
alikafka.hw.100xlarge1,500 + 2 × 500500 + 2 × 5006006,000
alikafka.hw.120xlarge1,800 + 2 × 600600 + 2 × 6007007,000
alikafka.hw.150xlarge2,250 + 2 × 750750 + 2 × 7508008,000
alikafka.hw.180xlarge2,700 + 2 × 900900 + 2 × 9009009,000
alikafka.hw.200xlarge3,000 + 2 × 1,0001,000 + 2 × 1,0001,00010,000

Edition comparison

The following table summarizes quota ranges by edition and performance mode.

EditionFree topicsFree partitionsThroughput model
Standard Edition (High Write)50 -- 150400 -- 900Symmetric read/write
Professional Edition (High Write)50 -- 1,0001,100 -- 10,000Symmetric read/write
Professional Edition (High Read)50 -- 1,0001,100 -- 10,000Asymmetric (higher read)

At the same traffic specification tier, Professional Edition instances include significantly more free partitions than Standard Edition instances. For example, at the 2xlarge tier, Standard Edition (High Write) includes 400 free partitions, while Professional Edition (High Write) includes 1,100.

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