FAQ about cost savingWhy am I charged additional fees for a subscription RDS instance? How do I prevent additional fees? Am I still charged if I do not use a pay-as-you-go RDS instance? How much do I need to pay if I change the specifications of a subscription RDS instance? Do I need to make a payment when I apply for a public endpoint? How do I check whether backup fees are generated? How do I reduce the size of backup files and backup storage costs? How do I release an RDS instance if I no longer require the instance? If I release a read-only RDS instance, are my workloads affected? How do I view the time when a feature was enabled? FAQ about instance purchase and billing methodsAfter I submit an order to purchase an RDS instance, the system does not respond and I cannot find the RDS instance in the Creating state. Why? When an entry-level RDS instance and an enterprise-level RDS instance have the same CPU and memory specifications, why does the entry-level RDS instance support a larger number of connections and deliver higher IOPS than the enterprise-level RDS instance? Can I switch the billing method of an RDS instance between subscription and pay-as-you-go? FAQ about instance expiration and overdue paymentsWhat happens if my RDS instance expires or becomes overdue? What are the billing rules for serverless ApsaraDB RDS for MySQL instances? Do serverless ApsaraDB RDS for MySQL instances expire? Do I need to unsubscribe from a subscription RDS instance after the instance expires? Are fees generated if I do not unsubscribe from the instance? If an RDS instance is locked due to overdue payments, are fees generated when the instance is locked? The data of an RDS instance is deleted on the 16th day after the instance expires. Can I restore the data? Which RDS instances are affected by overdue payments? What do I do if the The MySQL server is running with the LOCK_WRITE option so it cannot execute this statement error message is displayed when I use my RDS instance? Can I change the configuration of an RDS instance that is locked due to expiration or overdue payments? What do I do if an RDS instance is still in the Locked state after it is renewed? Can I use the discount that is provided when I purchase an RDS instance for instance renewal? If an RDS instance is locked due to expiration or overdue payments, can I back up the instance and export the backup files? An RDS instance is locked due to expiration and is renewed. Do I need to perform other operations? Does the RDS instance automatically run as normal? After an RDS instance expires and is released, the instance is rebuilt from the recycle bin. Is the data of the rebuilt RDS instance the same as the data of the released RDS instance? If I use a RAM user to renew an RDS instance, what permissions do I need to grant to the RAM user? How do I use DTS to migrate the data of a locked RDS instance to another RDS instance? How do I restore a subscription RDS instance if the instance expires? A subscription RDS instance is about to expire. How do I downgrade the configuration when I renew the RDS instance? What do I do if an RDS instance is locked and data cannot be written to the instance? My subscription RDS instance is locked due to expiration and is renewed. How do I change the billing method of the RDS instance from subscription to pay-as-you-go? Where can I view the RDS instances that are about to expire? How do I apply for a contract before I renew an RDS instance?