Amazon DocumentDB
Developer Guide

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Modifies settings for an instance. You can change one or more database configuration parameters by specifying these parameters and the new values in the request.

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.


The instance identifier. This value is stored as a lowercase string.


  • Must match the identifier of an existing DBInstance.

Type: String

Required: Yes


Specifies whether the modifications in this request and any pending modifications are asynchronously applied as soon as possible, regardless of the PreferredMaintenanceWindow setting for the instance.

If this parameter is set to false, changes to the instance are applied during the next maintenance window. Some parameter changes can cause an outage and are applied on the next reboot.

Default: false

Type: Boolean

Required: No


Indicates that minor version upgrades are applied automatically to the instance during the maintenance window. Changing this parameter doesn't result in an outage except in the following case, and the change is asynchronously applied as soon as possible. An outage results if this parameter is set to true during the maintenance window, and a newer minor version is available, and Amazon DocumentDB has enabled automatic patching for that engine version.

Type: Boolean

Required: No


Indicates the certificate that needs to be associated with the instance.

Type: String

Required: No


The new compute and memory capacity of the instance; for example, db.r5.large. Not all instance classes are available in all AWS Regions.

If you modify the instance class, an outage occurs during the change. The change is applied during the next maintenance window, unless ApplyImmediately is specified as true for this request.

Default: Uses existing setting.

Type: String

Required: No


The new instance identifier for the instance when renaming an instance. When you change the instance identifier, an instance reboot occurs immediately if you set Apply Immediately to true. It occurs during the next maintenance window if you set Apply Immediately to false. This value is stored as a lowercase string.


  • Must contain from 1 to 63 letters, numbers, or hyphens.

  • The first character must be a letter.

  • Cannot end with a hyphen or contain two consecutive hyphens.

Example: mydbinstance

Type: String

Required: No


The weekly time range (in UTC) during which system maintenance can occur, which might result in an outage. Changing this parameter doesn't result in an outage except in the following situation, and the change is asynchronously applied as soon as possible. If there are pending actions that cause a reboot, and the maintenance window is changed to include the current time, changing this parameter causes a reboot of the instance. If you are moving this window to the current time, there must be at least 30 minutes between the current time and end of the window to ensure that pending changes are applied.

Default: Uses existing setting.

Format: ddd:hh24:mi-ddd:hh24:mi

Valid days: Mon, Tue, Wed, Thu, Fri, Sat, Sun

Constraints: Must be at least 30 minutes.

Type: String

Required: No


A value that specifies the order in which an Amazon DocumentDB replica is promoted to the primary instance after a failure of the existing primary instance.

Default: 1

Valid values: 0-15

Type: Integer

Required: No

Response Elements

The following element is returned by the service.


Detailed information about an instance.

Type: DBInstance object


For information about the errors that are common to all actions, see Common Errors.


The specified CIDR IP or Amazon EC2 security group isn't authorized for the specified security group.

Amazon DocumentDB also might not be authorized to perform necessary actions on your behalf using IAM.

HTTP Status Code: 404


CertificateIdentifier doesn't refer to an existing certificate.

HTTP Status Code: 404


You already have a instance with the given identifier.

HTTP Status Code: 400


DBInstanceIdentifier doesn't refer to an existing instance.

HTTP Status Code: 404


DBParameterGroupName doesn't refer to an existing parameter group.

HTTP Status Code: 404


DBSecurityGroupName doesn't refer to an existing security group.

HTTP Status Code: 404


The upgrade failed because a resource that the depends on can't be modified.

HTTP Status Code: 400


The specified instance class isn't available in the specified Availability Zone.

HTTP Status Code: 400


The specified instance isn't in the available state.

HTTP Status Code: 400


The state of the security group doesn't allow deletion.

HTTP Status Code: 400


The subnet group doesn't cover all Availability Zones after it is created because of changes that were made.

HTTP Status Code: 400


The request would cause you to exceed the allowed amount of storage available across all instances.

HTTP Status Code: 400


Storage of the specified StorageType can't be associated with the DB instance.

HTTP Status Code: 400

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: