This topic describes the x86 and ARM architectures that are supported by ApsaraDB RDS.
ApsaraDB RDS for MySQL and ApsaraDB RDS for PostgreSQL support both the x86 and ARM architectures. When you create an RDS instance, you can select an architecture based on your business requirements.
x86: Each vCPU corresponds to the hyper-thread of a processor core.
ARM: Each vCPU corresponds to the physical core of a processor. The ARM architecture delivers stable performance by using dedicated resources. RDS instances that run on the ARM architecture provide the same user experience as the RDS instances that run on the x86 architecture. However, the ARM architecture is more cost-effective and helps you improve efficiency.
The ARM architecture is now included in the cost-effective product type. For more information, see Product types.
The following table provides a comparison between the x86 and ARM architectures.
Major engine version
The ARM architecture provides the same features as the x86 architecture, which avoids compatibility issues.
Available instance type
RDS Basic Edition, RDS High-availability Edition, RDS Enterprise Edition, and RDS Cluster Edition
RDS High-availability Edition
The ARM architecture is available in the following regions: China (Hangzhou), China (Shanghai), China (Beijing), China (Zhangjiakou), China (Shenzhen), and Singapore.
The ARM architecture will be available in other regions in the future. The ApsaraDB RDS buy page displays the regions that support the ARM architecture.
Enhanced SSD (ESSD), local SSD, and standard SSD
Enhanced SSD (ESSD)