Scaling Up Storage Space

Scenarios

If the original storage space is insufficient as your services grow, scale up storage space of your DB instance.

A DB instance needs to preserve at least 15% of its capacity to work properly. The new minimum storage space required to make this instance available has been automatically calculated for you. You are advised to set alarm rules for the storage space usage by referring to Setting Alarm Rules.

RDS allows you to scale up storage space of DB instances but you cannot change the storage type. During the scale-up period, services are not interrupted.

Constraints

• You can scale up storage space only when your account balance is greater than or equal to $0 USD.
• DB instances can be scaled up numerous times.
• The maximum allowed storage is 4,000 GB. There is no limit on the number of scale-ups. If you want to increase the storage upper limit, contact customer service.
• The maximum allowed storage space for some Microsoft SQL Server DB instances is 2,000 GB because of constraints of the windows disk size. The actual maximum allowed storage space depends on the information displayed on the console.
• For primary/standby DB instances, scaling up the primary DB instance will cause the standby DB instance to also be scaled up accordingly.
• You cannot reboot or delete a DB instance that is being scaled up.
• Storage space can only be scaled up.
• If you scale up a DB instance with the disk encrypted, the expanded storage space will be encrypted using the original encryption key.

Procedure

1. Log in to the management console.
2. Click in the upper left corner and select a region and a project.
3. Click in the upper left corner of the page and choose Databases > Relational Database Service.
4. On the Instances page, locate the target DB instance and choose More > Scale Storage Space in the Operation column.

   You can also perform the following operations to scale up storage space:

   • Click the target DB instance to enter the Basic Information page. In the Storage Space area, click Scale.
   • If the storage space is full, locate the target DB instance on the Instances page and click Scale in the Status column.

5. On the displayed page, specify the new storage space and click Next.

   The minimum start value of each scaling is 10 GB. A DB instance can be scaled up only by a multiple of 10 GB. The allowed maximum storage space is 4,000 GB.

   The maximum allowed storage space for some Microsoft SQL Server DB instances is 2,000 GB because of constraints of the windows disk size. The actual maximum allowed storage space depends on the information displayed on the console.

6. Confirm specifications.
   • If you need to modify your settings, click Previous.
   • If you do not need to modify the settings, click Submit for a pay-per-use instance or click Pay Now for a yearly/monthly instance.

7. View the scale-up result.

   Scaling up storage space takes 3-5 minutes. During this time period, the status of the DB instance on the Instances page will be Scaling up. After a while, click the DB instance and view the new storage space on the displayed Basic Information page to verify that the scale-up is successful.