What Are the Differences Between Instance Deletion and Unsubscription?

The method of releasing resources varies depending on the DB instance billing mode.

• For a DB instance billed in pay-per-use mode, no order is generated after you purchase it. To release resources based on service requirements, manually delete the DB instance on the Instance Management page.
• For a yearly/monthly DB instance, an order is generated after you purchase it. You need to unsubscribe from the order to release the DB instance resources. For details, see Unsubscribing from a Yearly/Monthly DB Instance.