You can change the specifications of an instance and its Internet bandwidth after it is created.
You can only upgrade or downgrade the specifications of vCPU and RAM simultaneously by changing instance types. The methods to change an instance type vary according to the billing method of the instance:
- Upgrade: Use the Upgrade Configuration feature. The new specification takes effect immediately.
- Downgrade: Use the Renew for Configuration Downgrade feature. You can downgrade the specification of an instance when you are renewing the instance. The new specification takes effect after you restart the instance in the ECS console within the first seven days of the new billing cycle.
Stopping an instance disrupts your business traffic. Proceed with caution.
You can adjust the Internet bandwidth of an instance. The methods vary by your business needs and the billing method of the instance. The following table lists the methods.
|Billing method of instances||Effective immediately||Available feature||Description|
|Subscription||Yes||Upgrade Configuration||Only applicable to VPC instances to which no EIP addresses are attached or instances of the Classic network type. After you upgrade your configurations, the Internet and the intranet IP addresses remain unchanged. If no Internet IP address is assigned to your instance when you create it, you can use this feature to assign the instance an Internet IP address.|
|Subscription||No. Effective in the new billing cycle||Renew for Configuration Downgrade||Adjust bandwidth in the new billing cycle. When the Internet bandwidth is set to 0 Mbit/s, the Internet IP address of a VPC instance is released in the new billing cycle, but that of an instance of the Classic network type is retained. If no Internet IP address is assigned to your instance when you create it, you can use this feature to assign the instance an Internet IP address.|
|Pay-As-You-Go or Subscription||Yes||Change Bandwidth||Only applicable to those VPC instances that EIP addresses are bound to. You can adjust the Internet bandwidth on an EIP address at any time.|