The general Enterprise SSD (ESSD) storage type is a new storage type that is supported by ApsaraDB RDS for PostgreSQL. General ESSDs are compatible with all features of ESSDs and support the I/O burst, I/O acceleration, and data archiving features. This topic describes how to change the storage type of an ApsaraDB RDS for PostgreSQL instance from ESSD to general ESSD.
Prerequisites
Your RDS instance uses an ESSD that provides at least 40 GB of storage capacity. Serverless RDS instances are not supported.
To optimize I/O performance, you can upgrade ESSDs of any performance level (PL) to general ESSDs.
Impacts
When you change the storage type of an RDS instance from ESSD to general ESSD, the change immediately takes effect and causes no transient connections. In most cases, your workloads are not adversely affected. In some cases, the IOPS of the RDS instance may fluctuate. We recommend that you perform this operation during off-peak hours.
Usage notes
The storage type change from ESSD to general ESSD takes effect based on the RDS edition of an RDS instance. If the RDS instance runs RDS Cluster Edition, the change takes effect on all primary and secondary nodes in the RDS cluster. If the RDS instance runs RDS High-availability Edition, the change takes effect on the primary and secondary RDS instances. If the RDS instance runs RDS Basic Edition, the change takes effect on the RDS instance. The change does not affect the storage types of read-only RDS instances. An RDS instance that runs RDS Cluster Edition is referred to as an RDS cluster. To change the storage type of a read-only RDS instance, go to the instance details page to perform the required operations.
When you change the storage type from ESSD to general ESSD, you can configure only the I/O burst feature. Other configurations cannot be modified.
You cannot change the storage type of an RDS instance from general ESSD to a different storage type. Proceed with caution before you change the storage type from ESSD to general ESSD.
Procedure
Log on to the ApsaraDB RDS console and go to the Instances page. In the top navigation bar, select the region in which the RDS instance resides. Then, find the RDS instance and click the ID of the instance.
In the Basic Information section of the page that appears, click Upgrade Storage Type to the right of Storage Type.
Optional. Enable the I/O burst feature. By default, this feature is disabled. For more information about the I/O burst feature, see Use the I/O burst feature.
On the Change Specifications page, read and select Terms of Service and click Pay Now to complete the payment.
NoteThe status of the RDS instance changes to Upgrading. When the status of the RDS instance changes to Running, the upgrade is complete.
References
For more information about general ESSDs, see General ESSDs.
For more information about the I/O burst feature of general ESSDs, see Use the I/O burst feature.
For more information about the I/O acceleration feature of general ESSDs, see Use the I/O acceleration feature.
For more information about the data archiving feature of general ESSDs, see Use the data archiving feature of general ESSDs.