Changing the DB Instance Class¶
Scenarios¶
This section describes how to change the DB instance class.
Note
A DB instance cannot be deleted when you are changing its instance class.
Instances can be scaled up or down.
For cluster and replica set instances, when the DB instance class is changed, a primary/secondary switchover may occur and the database connection will be interrupted for up to 30s. You are advised to change the specifications during off-peak hours to reduce impacts and ensure that your client can reconnect to the database if the connection is interrupted.
For a single node instance, services will be interrupted up to 10 minutes when you change DB instance class. You are advised to perform this operation during off-peak hours. After the restart is complete, the cached memory will be automatically cleared. The DB instance needs to be warmed up to prevent congestion during peak hours.