v.22.4Improvement
kafka_num_consumers can exceed physical cores on low resource machines
Now kafka_num_consumers can be bigger than amount of physical cores in case of low resource machine (less than 16 cores). #35926 (alesapin).Why it matters
This feature addresses resource allocation limitations on low-core machines by allowing more Kafka consumer threads than physical cores, improving Kafka consumption performance and flexibility in constrained environments.How to use it
To use this feature, configure thekafka_num_consumers setting with a value larger than the number of physical cores on machines that have fewer than 16 cores. This allows ClickHouse to spawn additional Kafka consumer threads beyond the physical core count.