**To modify an Amazon DocumentDB instance** The following ``modify-db-instance`` example modifies the Amazon DocumentDB instance ``sample-cluster2`` by changing its instance class to ``db.r4.4xlarge`` and its promotion tier to ``5``. The changes are applied immediately but can only be seen after the instances status is available. :: aws docdb modify-db-instance \ --db-instance-identifier sample-cluster2 \ --apply-immediately \ --db-instance-class db.r4.4xlarge \ --promotion-tier 5 Output:: { "DBInstance": { "EngineVersion": "3.6.0", "StorageEncrypted": false, "DBInstanceClass": "db.r4.large", "PreferredMaintenanceWindow": "mon:08:39-mon:09:09", "AutoMinorVersionUpgrade": true, "VpcSecurityGroups": [ { "VpcSecurityGroupId": "sg-77186e0d", "Status": "active" } ], "PreferredBackupWindow": "18:00-18:30", "EnabledCloudwatchLogsExports": [ "audit" ], "AvailabilityZone": "us-west-2f", "DBInstanceIdentifier": "sample-cluster2", "InstanceCreateTime": "2019-03-15T20:36:06.338Z", "Engine": "docdb", "BackupRetentionPeriod": 7, "DBSubnetGroup": { "DBSubnetGroupName": "default", "DBSubnetGroupDescription": "default", "SubnetGroupStatus": "Complete", "Subnets": [ { "SubnetIdentifier": "subnet-4e26d263", "SubnetAvailabilityZone": { "Name": "us-west-2a" }, "SubnetStatus": "Active" }, { "SubnetIdentifier": "subnet-afc329f4", "SubnetAvailabilityZone": { "Name": "us-west-2c" }, "SubnetStatus": "Active" }, { "SubnetIdentifier": "subnet-53ab3636", "SubnetAvailabilityZone": { "Name": "us-west-2d" }, "SubnetStatus": "Active" }, { "SubnetIdentifier": "subnet-991cb8d0", "SubnetAvailabilityZone": { "Name": "us-west-2b" }, "SubnetStatus": "Active" } ], "VpcId": "vpc-91280df6" }, "PromotionTier": 2, "Endpoint": { "Address": "sample-cluster2.corcjozrlsfc.us-west-2.docdb.amazonaws.com", "HostedZoneId": "ZNKXH85TT8WVW", "Port": 27017 }, "DbiResourceId": "db-A2GIKUV6KPOHITGGKI2NHVISZA", "DBClusterIdentifier": "sample-cluster", "DBInstanceArn": "arn:aws:rds:us-west-2:123456789012:db:sample-cluster2", "PendingModifiedValues": { "DBInstanceClass": "db.r4.4xlarge" }, "PubliclyAccessible": false, "DBInstanceStatus": "available" } } For more information, see `Modifying an Amazon DocumentDB Instance <https://docs.aws.amazon.com/documentdb/latest/developerguide/db-instance-modify.html>`__ in the *Amazon DocumentDB Developer Guide*.