The prices of read-only ApsaraDB RDS for PostgreSQL instances that use cloud disks are reduced from April 12, 2022.
Effective date
April 12, 2022
Price reductions
The prices of subscription read-only RDS instances are reduced by approximately 45%.
The prices of pay-as-you-go read-only RDS instances are reduced by approximately 17%.
For example, before April 12, 2022, the price of a subscription read-only RDS instance is USD 100 per month. After April 12, 2022, the price of the instance is approximately USD 55 per month based on the following calculation: 100 × (1 - 45%) = 55.
Introduction to read-only RDS instances
To offload read requests from the primary RDS instance, you can create one or more read-only RDS instances. Read-only RDS instances help increase the read capability of your database system and the throughput of your application.
When a read-only RDS instance is being created, ApsaraDB RDS replicates data from the secondary RDS instance to the read-only RDS instance. After the read-only RDS instance is created, it has the same data as the primary RDS instance. In addition, after the data on the primary RDS instance is updated, ApsaraDB RDS immediately synchronizes the update to all read-only RDS instances that are attached to the primary RDS instance.
Purchase read-only RDS instances
For more information about how to create a read-only RDS instance, see Create a read-only ApsaraDB RDS for PostgreSQL instance.