Yandex Managed Service for Sharded PostgreSQL host classes

The host class determines the computing power allocated for each host in a Managed Service for Sharded PostgreSQL cluster.

If a cluster uses standard sharding, changing the host class updates the properties of all previously created hosts.

If a cluster uses advanced sharding, the host class is changed separately for hosts with the ROUTER and COORDINATOR roles. Changing the configuration updates the properties of all previously created hosts.

Available host classesAvailable host classes

Hosts in Managed Service for Sharded PostgreSQL clusters are deployed on Yandex Compute Cloud VMs. You can create these VMs on any platforms Compute Cloud supports. To learn more about the platforms, see this article.

The full list of possible host configurations on each platform is provided below. All configurations support two disk types: network-ssd and network-hdd.

The storage size does not depend on the host class.

Configuration types:

• s1, s2, s3, and s4a: Standard configurations with a 4:1 RAM GB to vCPU ratio.

• m2, m3, and m4a: Configurations with an increased RAM GB to vCPU ratio (8:1). These configurations may be useful for clusters with higher cache requirements.

• c3 and c4a: Configurations with a reduced RAM GB to vCPU ratio (2:1). These configurations may be useful for clusters with higher processor performance requirements.

• b1, b2, b3: Configurations with a guaranteed vCPU share under 100%. This host class is intended for test load, while the minimum recommended host configuration for production solutions is two vCPUs with a guaranteed share of 50%.

  Note

  Hosts with a guaranteed vCPU share under 50% cannot be used in multi-host clusters.