实例规格
RDS for SQL Server实例支持的数据库版本请参见数据库引擎和版本。
RDS for SQL Server实例规格的CPU架构为X86架构，详见表1。支持的规格列表请参见表2。
| 规格 | 说明 | 适用场景 |
|---|---|---|
| 通用型 | 与同一物理机上的其他通用型规格实例共享CPU资源，通过资源复用换取CPU使用率最大化，性价比较高，适用于对性能稳定性要求较低的应用场景。 | 侧重对成本、性价比要求较高的场景。 |
| 独享型 | 完全独享的CPU和内存，性能长期稳定，不会因为物理机上其它实例的行为而受到影响，适用于对性能稳定性要求较高的应用场景。 | 电商、游戏、金融、政企等核心数据库场景。 |
| 规格 | 集群版实例规格码 | 单机实例规格码 | 主备实例规格码 | 只读实例规格码 | vCPU(个) | 内存(GB)a |
|---|---|---|---|---|---|---|
| 通用型 | - | rds.mssql.spec.n1.web.large.2 | - | - | 2 | 4 |
| - | rds.mssql.spec.n1.web.large.4 | - | - | 2 | 8 | |
| - | rds.mssql.spec.n1.web.xlarge.2 | - | - | 4 | 8 | |
| - | rds.mssql.spec.n1.web.xlarge.4 | - | - | 4 | 16 | |
| - | rds.mssql.spec.n1.web.2xlarge.2 | - | - | 8 | 16 | |
| - | rds.mssql.spec.n1.web.2xlarge.4 | - | - | 8 | 32 | |
| - | rds.mssql.spec.n1.se.large.2 | - | - | 2 | 4 | |
| - | rds.mssql.spec.n1.se.xlarge.2 | rds.mssql.spec.n1.se.xlarge.2.ha | - | 4 | 8 | |
| - | rds.mssql.spec.n1.se.2xlarge.2 | rds.mssql.spec.n1.se.2xlarge.2.ha | - | 8 | 16 | |
| - | rds.mssql.spec.n1.se.4xlarge.2 | rds.mssql.spec.n1.se.4xlarge.2.ha | - | 16 | 32 | |
| rds.mssql.spec.n1.ee.large.2.ha | rds.mssql.spec.n1.ee.large.2 | - | - | 2 | 4 | |
| rds.mssql.spec.n1.ee.xlarge.2.ha | rds.mssql.spec.n1.ee.xlarge.2 | - | rds.mssql.spec.n1.ee.xlarge.2.rr | 4 | 8 | |
| rds.mssql.spec.n1.ee.2xlarge.2.ha | rds.mssql.spec.n1.ee.2xlarge.2 | - | rds.mssql.spec.n1.ee.2xlarge.2.rr | 8 | 16 | |
| rds.mssql.spec.n1.ee.4xlarge.2.ha | rds.mssql.spec.n1.ee.4xlarge.2 | - | rds.mssql.spec.n1.ee.4xlarge.2.rr | 16 | 32 | |
| 独享型 说明： 不同引擎版本支持的独享型规格存在差异，请以实际环境为准。 | - | rds.mssql.spec.x1.web.large.4 | - | - | 2 | 8 |
| - | rds.mssql.spec.x1.web.large.8 | - | - | 2 | 16 | |
| - | rds.mssql.spec.x1.web.xlarge.4 | - | - | 4 | 16 | |
| - | rds.mssql.spec.x1.web.xlarge.8 | - | - | 4 | 32 | |
| - | rds.mssql.spec.x1.web.2xlarge.4 | - | - | 8 | 32 | |
| - | rds.mssql.spec.x1.web.2xlarge.8 | - | - | 8 | 64 | |
| - | rds.mssql.spec.x1.web.4xlarge.4 | - | - | 16 | 64 | |
| - | rds.mssql.spec.x1.se.large.4 | rds.mssql.spec.x1.se.large.4.ha | - | 2 | 8 | |
| - | rds.mssql.spec.x1.se.large.8 | rds.mssql.spec.x1.se.large.8.ha | - | 2 | 16 | |
| - | rds.mssql.spec.x1.se.xlarge.2 | rds.mssql.spec.x1.se.xlarge.2.ha | - | 4 | 8 | |
| - | rds.mssql.spec.x1.se.xlarge.4 | rds.mssql.spec.x1.se.xlarge.4.ha | - | 4 | 16 | |
| - | rds.mssql.spec.x1.se.xlarge.8 | rds.mssql.spec.x1.se.xlarge.8.ha | - | 4 | 32 | |
| - | rds.mssql.spec.x1.se.2xlarge.4 | rds.mssql.spec.x1.se.2xlarge.4.ha | - | 8 | 32 | |
| - | rds.mssql.spec.x1.se.2xlarge.8 | rds.mssql.spec.x1.se.2xlarge.8.ha | - | 8 | 64 | |
| - | rds.mssql.spec.x1.se.4xlarge.4 | rds.mssql.spec.x1.se.4xlarge.4.ha | - | 16 | 64 | |
| - | rds.mssql.spec.x1.se.4xlarge.8 | rds.mssql.spec.x1.se.4xlarge.8.ha | - | 16 | 128 | |
| rds.mssql.spec.x1.ee.large.4.ha | rds.mssql.spec.x1.ee.large.4 | rds.mssql.spec.x1.ee.large.4.ha | rds.mssql.spec.x1.ee.large.4.rr | 2 | 8 | |
| rds.mssql.spec.x1.ee.large.8.ha | rds.mssql.spec.x1.ee.large.8 | rds.mssql.spec.x1.ee.large.8.ha | rds.mssql.spec.x1.ee.large.8.rr | 2 | 16 | |
| rds.mssql.spec.x1.ee.xlarge.2.ha | rds.mssql.spec.x1.ee.xlarge.2 | rds.mssql.spec.x1.ee.xlarge.2.ha | rds.mssql.spec.x1.ee.xlarge.2.rr | 4 | 8 | |
| rds.mssql.spec.x1.ee.xlarge.4.ha | rds.mssql.spec.x1.ee.xlarge.4 | rds.mssql.spec.x1.ee.xlarge.4.ha | rds.mssql.spec.x1.ee.xlarge.4.rr | 4 | 16 | |
| rds.mssql.spec.x1.ee.xlarge.8.ha | rds.mssql.spec.x1.ee.xlarge.8 | rds.mssql.spec.x1.ee.xlarge.8.ha | rds.mssql.spec.x1.ee.xlarge.8.rr | 4 | 32 | |
| rds.mssql.spec.x1.ee.2xlarge.2.ha | rds.mssql.spec.x1.ee.2xlarge.2 | rds.mssql.spec.x1.ee.2xlarge.2.ha | rds.mssql.spec.x1.ee.2xlarge.2.rr | 8 | 16 | |
| rds.mssql.spec.x1.ee.2xlarge.4.ha | rds.mssql.spec.x1.ee.2xlarge.4 | rds.mssql.spec.x1.ee.2xlarge.4.ha | rds.mssql.spec.x1.ee.2xlarge.4.rr | 8 | 32 | |
| rds.mssql.spec.x1.ee.2xlarge.8.ha | rds.mssql.spec.x1.ee.2xlarge.8 | rds.mssql.spec.x1.ee.2xlarge.8.ha | rds.mssql.spec.x1.ee.2xlarge.8.rr | 8 | 64 | |
| rds.mssql.spec.x1.ee.4xlarge.2.ha | rds.mssql.spec.x1.ee.4xlarge.2 | rds.mssql.spec.x1.ee.4xlarge.2.ha | rds.mssql.spec.x1.ee.4xlarge.2.rr | 16 | 32 | |
| rds.mssql.spec.x1.ee.4xlarge.4.ha | rds.mssql.spec.x1.ee.4xlarge.4 | rds.mssql.spec.x1.ee.4xlarge.4.ha | rds.mssql.spec.x1.ee.4xlarge.4.rr | 16 | 64 | |
| rds.mssql.spec.x1.ee.4xlarge.8.ha | rds.mssql.spec.x1.ee.4xlarge.8 | rds.mssql.spec.x1.ee.4xlarge.8.ha | rds.mssql.spec.x1.ee.4xlarge.8.rr | 16 | 128 | |
| rds.mssql.spec.x1.ee.8xlarge.2.ha | rds.mssql.spec.x1.ee.8xlarge.2 | rds.mssql.spec.x1.ee.8xlarge.2.ha | rds.mssql.spec.x1.ee.8xlarge.2.rr | 32 | 64 | |
| rds.mssql.spec.x1.ee.8xlarge.4.ha | rds.mssql.spec.x1.ee.8xlarge.4 | rds.mssql.spec.x1.ee.8xlarge.4.ha | rds.mssql.spec.x1.ee.8xlarge.4.rr | 32 | 128 | |
| rds.mssql.spec.x1.ee.8xlarge.8.ha | rds.mssql.spec.x1.ee.8xlarge.8 | rds.mssql.spec.x1.ee.8xlarge.8.ha | rds.mssql.spec.x1.ee.8xlarge.8.rr | 32 | 256 | |
| rds.mssql.spec.x1.ee.16xlarge.4.ha | rds.mssql.spec.x1.ee.16xlarge.4 | rds.mssql.spec.x1.ee.16xlarge.4.ha | rds.mssql.spec.x1.ee.16xlarge.4.rr | 64 | 256 | |
| - | rds.mssql.spec.x1.ee.16xlarge.8 | rds.mssql.spec.x1.ee.16xlarge.8.ha | - | 64 | 512 |
a：RDS for SQL Server实例规格定义的内存包括RDS相关管理服务、数据库服务和底层操作系统占用的内存（如BIOS预留内存、内核和Hypervisor运行内存等）。因此，您查看的可用内存会小于实例规格定义的内存。RDS for SQL Server云盘实例基于ECS搭建，各实例采用的ECS实例规格族可能不同，因此性能会有所差异。
数据库实例规格请以实际环境为准。
