Check if the DB instance class is supported in your Region by using the describe-orderable-db-instance-options command.
RDS Custom for SQL Server supports the DB instance classes shown in the following table:
SQL Server edition RDS Custom supportEnterprise Edition
db.r5.xlargeâdb.r5.24xlarge
db.r5b.xlargeâdb.r5b.24xlarge
db.m5.xlargeâdb.m5.24xlarge
db.r6i.xlargeâdb.r6i.32xlarge
db.m6i.xlargeâdb.m6i.32xlarge
db.x2iedn.xlargeâdb.x2iedn.32xlarge
Standard Edition
db.r5.largeâdb.r5.24xlarge
db.r5b.largeâdb.r5b.8xlarge
db.m5.largeâdb.m5.24xlarge
db.r6i.largeâdb.r6i.8xlarge
db.m6i.largeâdb.m6i.8xlarge
db.x2iedn.xlargeâdb.x2iedn.8xlarge
Developer Edition
db.r5.xlargeâdb.r5.24xlarge
db.r5b.xlargeâdb.r5b.24xlarge
db.m5.xlargeâdb.m5.24xlarge
db.r6i.xlargeâdb.r6i.32xlarge
db.m6i.xlargeâdb.m6i.32xlarge
db.x2iedn.xlargeâdb.x2iedn.32xlarge
Web Edition
db.r5.largeâdb.r5.4xlarge
db.m5.largeâdb.m5.4xlarge
db.r6i.largeâdb.r6i.4xlarge
db.m6i.largeâdb.m6i.4xlarge
db.r5b.largeâdb.r5b.4xlarge
The following recommendations apply to db.x2iedn class types:
At creation, local storage is a raw and unallocated device. Before using a DB instance with this instance class, you must mount and format the local storage. Afterward, configure tempdb
on it to ensure optimal performance. For more information, see Optimize tempdb performance in Amazon RDS Custom for SQL Server using local instance storage.
Local storage reverts to its raw and unallocated state when you run DB instance operations such as scale compute, instance replacement, snapshot restore, or point-in-time recovery (PITR). In these situations, you must remount, reformat, and reconfigure the drive and tempdb
to restore functionality.
For Multi-AZ instances, we recommend that you perform the configuration on a standby DB instance. This way, if a failover occurs, the system continues to operate without issues because the configuration is already in place on the standby instance.
RDS Custom for SQL Server requirements and limitations
Collation and character support
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