[gaploid]

Why are you using 'threads' instead of vcpus or aws instances like it was for other benchmarks? Thats really hard to compare and add suspicions here.

[zX41ZdbW]

It is related to the "max_threads" setting of ClickHouse, and by default, it is the number of physical CPU cores, which is twice lower as the number of vCPUs.

For example, the c6a.4xlarge instance type in AWS has 16 vCPUs, 8 cores and "max_threads" in ClickHouse will be 8.