For clusters using the subscription storage billing method, you can manually increase the allocated storage capacity at any time through the PolarDB console.
Limits
Manual scale-up applies only to clusters using the subscription storage billing method.
Serverless clusters use pay-as-you-go storage billing and scale storage automatically — no manual action required.
How billing works when storage is exhausted
After your purchased storage capacity is exhausted, the cluster continues to operate normally. Excess data is charged as follows:
If you have a storage plan, excess usage is deducted from the storage plan first.
After the storage plan is exhausted, the remaining excess is billed on a pay-as-you-go basis.
Example: You purchase 100 GB of subscription storage and a 50 GB storage plan, but your cluster uses 200 GB. For the 100 GB that exceeds your purchased capacity: 50 GB is deducted from the storage plan, and the remaining 50 GB is billed on a pay-as-you-go basis.
Scale up storage capacity
Log on to the PolarDB console.
In the upper-left corner, select the region where your cluster is deployed.
Find the cluster and click its ID.
In the Distributed Storage section of the Basic Information page, click Manually Scale Up.
On the Change Configurations page, select the required Storage Capacity, select the Terms of Service, and then click Buy Now.
On the Purchase page, confirm the unpaid order and click Purchase.