This topic describes the default read weights of ApsaraDB RDS for SQL Server instances that have different specifications.

ApsaraDB RDS provides default read weights for read-only RDS instances.

Table 1. Default read weights of read-only RDS instances
Instance type Instance family Memory CPU Default read weight
rds.mssql.s2.large General-purpose 4 GB 2 400
rds.mssql.s3.large General-purpose 8 GB 4 800
rds.mssql.c1.large General-purpose 16 GB 8 1600
rds.mssql.s2.xlarge General-purpose 8 GB 2 800
rds.mssql.m1.medium General-purpose 16 GB 4 1600
rds.mssql.c1.xlarge General-purpose 32 GB 8 3200
rds.mssql.c2.xlarge General-purpose 64 GB 16 6400