YugabyteDB Managed supports both horizontal and vertical scaling of clusters. If your workloads have increased, you can dynamically add nodes to a running cluster to improve latency, throughput, and memory. Likewise, if your cluster is over-scaled, you can reduce nodes to reduce costs.

You can scale the following cluster properties:

• Number of nodes (horizontal).
• Number of vCPUs per node (vertical).
• Disk size per node.

For clusters with Node level and Availability zone level fault tolerance, the scaling operation is performed without any downtime, with a rolling restart of the underlying nodes.

The Regions section on the cluster Settings tab summarizes the cluster configuration, including the number of nodes, vCPUs, memory, and disk per node, and VPC for each region.

Recommendations

• Most production applications require 4 to 8 vCPUs per node. Scale up smaller instance sizes; when the total number of vCPUs for your cluster exceeds 16, consider scaling out. For example, if you have a 3-node cluster with 2 vCPUs per node, scale up to 8 vCPUs per node before adding nodes.

• Adding or removing nodes incurs a load on the cluster. Perform scaling operations when the cluster isn't experiencing heavy traffic. Scaling during times of heavy traffic can temporarily degrade application performance and increase the length of time of the scaling operation.

• Before removing nodes from a cluster, make sure the reduced disk space will be sufficient for the existing and anticipated data.

Limitations

• You can horizontally scale nodes in clusters with Node level fault tolerance in increments of 1. Nodes in clusters with Availability zone level fault tolerance are scaled in increments of 3.

• You can configure up to 16 vCPUs per node. To have more than 16 vCPUs per node, send your request to Yugabyte Support.

• To avoid data loss, you can only increase disk size per node; once increased, you can't reduce it.

• You can't change the fault tolerance of a cluster after it is created.

• You can't scale single node clusters (fault tolerance none), you can only increase disk size.

• You can't scale Sandbox clusters.

Scale and configure clusters

Single-region clusters

You can scale multi-node single-region clusters horizontally and vertically.

To scale a single-region cluster:

1. On the Clusters page, select your cluster.

2. On the Settings tab or under Actions, choose Edit Infrastructure to display the Edit Infrastructure dialog.

   

3. Enter the number of nodes, vCPUs per node, and disk size in GB per node for the cluster.
   Cost displays the estimated new cost for the cluster; + Usage refers to any potential overages from exceeding the free allowances for disk storage, backup storage, and data transfer. For information on how clusters are costed, refer to Cluster costs.

4. Click Confirm and Save Changes when you are done.

Depending on the number of nodes, the scaling operation can take several minutes or more, during which time some cluster operations will not be available.

Replicate across regions clusters

You can scale multi-region replicated clusters horizontally and vertically.

To scale nodes in a multi-region replicated cluster:

1. On the Clusters page, select your cluster.

2. On the Settings tab or under Actions, choose Edit Infrastructure to display the Edit Infrastructure dialog.

   

3. Enter the number of nodes, vCPUs per node, and disk size in GB per node for the cluster. The same number of nodes and node sizes apply across all regions.
   Cost displays the estimated new cost for the cluster; + Usage refers to any potential overages from exceeding the free allowances for disk storage, backup storage, and data transfer. For information on how clusters are costed, refer to Cluster costs.

4. Click Confirm and Save Changes when you are done.

Depending on the number of nodes, the scaling operation can take several minutes or more, during which time some cluster operations will not be available.