Change instance configuration

A PolarDB-X 1.0 instance is a distributed cluster where multiple compute nodes handle tasks such as SQL routing, data merging, and data aggregation. You can change the instance configuration to upgrade or downgrade your PolarDB-X 1.0 instance. Upgrading during peak hours helps handle higher workloads, while downgrading during off-peak hours saves costs.

Notes

A configuration change interrupts connections to the instance, which may cause transient connection errors. Ensure that your application has a reconnection mechanism.
If you use persistent connections, newly added compute nodes cannot immediately receive traffic after an upgrade. We recommend that you perform a phased restart of your ECS instances. This means you first restart a small number of ECS instances that handle minimal services. After confirming the services run correctly, restart the remaining ECS instances.

Procedure

Log on to the PolarDB-X 1.0 console.
In the top navigation bar, select the region where the instance is deployed.
In the left-side navigation pane, click Instances.
Find the instance and click the instance ID to go to the Basic Information page.
In the Common Actions section, click Upgrade or Downgrade to open the change instance configuration page.
On the change instance configuration page, select the target instance series and instance type, read and agree to the terms of service, and then click Buy Now.
After completing the payment, wait about five minutes for the change to take effect. You can then view the new configuration on the Instances page.