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 in the Amazon DocumentDB Developer Guide.