All Products
Document Center

ApsaraDB RDS:FAQ about storage capacity

Last Updated:Aug 24, 2023

This topic provides answers to some frequently asked questions about the storage capacity of ApsaraDB RDS instances.

Can I expand the storage capacity of my RDS instance without data migration? What are the impacts of an expansion?

If the host on which your RDS instance is deployed can provide sufficient storage resources, data migration is not required. If the host cannot provide sufficient storage resources, the system creates an RDS instance on a host that can provide sufficient storage resources and migrates the data of your RDS instance to the new RDS instance that has the required storage capacity.

What are the billing rules for storage capacity expansion?

After you expand the storage capacity of your RDS instance, the fee that is generated for the RDS instance change. For more information, see Billing details about configuration change.

How do I troubleshoot an abrupt increase in storage usage?

  1. Log on to the ApsaraDB RDS console and go to the Instances page. In the top navigation bar, select the region in which your RDS instance resides. Then, find your RDS instance and click the instance ID.
  2. In the left-side navigation pane of the page that appears, click Monitoring and Alerts. On the page that appears, view the data types and trends of the occupied storage. 1

How do I release storage by deleting files?

I created an empty database on my RDS instance, but the database occupies storage. Why?

When the database is initialized, system tables are created to store information about accounts and permissions. In addition, the logs of the database system, such as redo logs and undo logs, occupy storage.

Why more storage is occupied by MySQL databases when data is imported from other heterogeneous databases?

Different database storage engines process data in different ways. For example, the compression feature and indexes on some fields affect the storage usage.

Does the storage capacity of an RDS instance include backup storage?

The value of the Storage Capacity parameter does not count backup storage. To view the value of this parameter, perform the following operations: Log on to the ApsaraDB RDS console, go to the Basic Information page of your RDS instance, and then locate the Storage Capacity parameter in the Usage Statistics section. For more information about the backup storage usage, see View and manage the size of backup files.