Host classes in Managed Service for ClickHouse
The host class determines the computing power allocated for each host in a cluster. When you change the host class for a cluster, all existing hosts change to match it.
The host class affects the Max server memory usage DBMS setting that limits the amount of RAM available for ClickHouse to run. For more information, see Memory management.
Available host classes
Hosts in Managed Service for ClickHouse clusters are deployed on Compute Cloud VMs. You can create these VMs on any platforms Compute Cloud supports. See Platforms for a detailed description.
The full list of possible host configurations on each platform is provided below.
Configuration types:
- s3: Standard configuration, with 4:1 RAM GB to vCPU ratio.
- m3: Configuration with an increased RAM GB to vCPU ratio (8:1). These configurations may be useful for clusters with higher cache requirements.
- c3: Configurations with a reduced RAM GB to vCPU ratio (2:1). These configurations may be useful for clusters with higher processor performance requirements.
Host class name | Number of vCPUs | Guaranteed vCPU performance | RAM, GB | Disk size, GB |
---|---|---|---|---|
Intel Ice Lake | ||||
s3-c2-m8 | 2 | 100% | 8 | 10 - 8192 |
s3-c4-m16 | 4 | 100% | 16 | 10 - 8192 |
s3-c8-m32 | 8 | 100% | 32 | 10 - 8192 |
s3-c12-m48 | 12 | 100% | 48 | 10 - 8192 |
s3-c16-m64 | 16 | 100% | 64 | 10 - 8192 |
s3-c24-m96 | 24 | 100% | 96 | 10 - 8192 |
s3-c32-m128 | 32 | 100% | 128 | 10 - 8192 |
s3-c40-m160 | 40 | 100% | 160 | 10 - 8192 |
s3-c48-m192 | 48 | 100% | 192 | 10 - 8192 |
s3-c64-m256 | 64 | 100% | 256 | 10 - 8192 |
s3-c80-m320 | 80 | 100% | 320 | 10 - 8192 |
s3-c96-m576 | 96 | 100% | 576 | 10 - 8192 |
m3-c2-m16 | 2 | 100% | 16 | 10 - 8192 |
m3-c4-m32 | 4 | 100% | 32 | 10 - 8192 |
m3-c6-m48 | 6 | 100% | 48 | 10 - 8192 |
m3-c8-m64 | 8 | 100% | 64 | 10 - 8192 |
m3-c12-m96 | 12 | 100% | 96 | 10 - 8192 |
m3-c16-m128 | 16 | 100% | 128 | 10 - 8192 |
m3-c24-m192 | 24 | 100% | 192 | 10 - 8192 |
m3-c32-m256 | 32 | 100% | 256 | 10 - 8192 |
m3-c40-m320 | 40 | 100% | 320 | 10 - 8192 |
m3-c48-m384 | 48 | 100% | 384 | 10 - 8192 |
m3-c56-m448 | 56 | 100% | 448 | 10 - 8192 |
m3-c64-m512 | 64 | 100% | 512 | 10 - 8192 |
m3-c80-m640 | 80 | 100% | 640 | 10 - 8192 |
c3-c2-m4 | 2 | 100% | 4 | 10 - 8192 |
c3-c4-m8 | 4 | 100% | 8 | 10 - 8192 |
c3-c8-m16 | 8 | 100% | 16 | 10 - 8192 |
c3-c12-m24 | 12 | 100% | 24 | 10 - 8192 |
c3-c16-m32 | 16 | 100% | 32 | 10 - 8192 |
c3-c24-m48 | 24 | 100% | 48 | 10 - 8192 |
c3-c32-m64 | 32 | 100% | 64 | 10 - 8192 |
c3-c40-m80 | 40 | 100% | 80 | 10 - 8192 |
c3-c48-m96 | 48 | 100% | 96 | 10 - 8192 |
c3-c64-m128 | 64 | 100% | 128 | 10 - 8192 |
c3-c80-m160 | 80 | 100% | 160 | 10 - 8192 |
c3-c96-m192 | 96 | 100% | 192 | 10 - 8192 |