Architectures - - Alibaba Cloud Documentation Center

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.

Note

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.

Item	X86	ARM
Database engine	MySQL PostgreSQL SQL Server MariaDB	MySQL PostgreSQL
Major engine version	MySQL: 5.5, 5.6, 5.7, and 8.0 PostgreSQL: 10, 11, 12, 13, 14, and 15 SQL Server: 2008 R2, 2012, 2016, 2017, and 2019 MariaDB: 10.3	MySQL: 8.0 PostgreSQL: 13, 14, and 15
Feature	Features of ApsaraDB RDS for MySQL instances Features of ApsaraDB RDS for PostgreSQL instances Features of ApsaraDB RDS for SQL Server instances Features of ApsaraDB RDS for MariaDB instances	The ARM architecture provides the same features as the x86 architecture, which avoids compatibility issues. Features of ApsaraDB RDS for MySQL instances Features of ApsaraDB RDS for PostgreSQL instances
Available instance type	Primary ApsaraDB RDS for MySQL instance types (x86) Primary ApsaraDB RDS for PostgreSQL instance types (x86) Primary ApsaraDB RDS for SQL Server instance types Primary ApsaraDB RDS for MariaDB instance types	Primary ApsaraDB RDS for MySQL instance types (ARM) Primary ApsaraDB RDS for PostgreSQL instance types (ARM)
RDS edition	RDS Basic Edition, RDS High-availability Edition, RDS Enterprise Edition, and RDS Cluster Edition	RDS High-availability Edition
Region	All regions	The ARM architecture is available in the following regions: China (Hangzhou), China (Shanghai), China (Beijing), China (Zhangjiakou), China (Shenzhen), and Singapore. Note 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.
Storage type	Enhanced SSD (ESSD), local SSD, and standard SSD	Enhanced SSD (ESSD)