ModifyDBInstanceHAConfig

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2. Input Parameters

The following request parameter list only provides API request parameters and some common parameters. For the complete common parameter list, see Common Request Parameters.

Parameter Name	Required	Type	Description
Action	Yes	String	Common Params. The value used for this API: ModifyDBInstanceHAConfig.
Version	Yes	String	Common Params. The value used for this API: 2017-03-12.
Region	No	String	Common Params. This parameter is not required for this API.
DBInstanceId	Yes	String	Instance ID
SyncMode	Yes	String	Primary-standby sync mode. Valid values: `Semi-sync` `Async`
MaxStandbyLatency	Yes	Integer	Maximum data lag for high-availability standby server. The standby node can be promoted to the primary node when its data lag and the delay time are both less than the value of `MaxStandbyLatency` and `MaxStandbyLag` respectively. Unit: byte Value range: 1073741824-322122547200
MaxStandbyLag	Yes	Integer	The maximum delay for high-availability standby server The standby node can be promoted to the primary node when its data lag and the delay time are both less or equals to the value of `MaxStandbyLatency` and `MaxStandbyLag` respectively. Unit: s Value range: 5-10
MaxSyncStandbyLatency	No	Integer	Maximum data sync lag for standby server. If data lag of the standby node and the delay ime are both less than or equals to the values of `MaxSyncStandbyLatency` and `MaxSyncStandbyLag`, the standby server adopts semi-sync replication; if not, it adopts async replication. This value is only valid for the instance with `SyncMode` set to `Semi-sync`. When the semi-sync replication mode of the instance is not allowed to downgrade to async replication, `MaxSyncStandbyLatency` and `MaxSyncStandbyLag` are not required. When the semi-sync instance is allowed to downgrade to async replication, `MaxSyncStandbyLatency` is required and `MaxSyncStandbyLag` must be left empty for PostgreSQL 9; `MaxSyncStandbyLatency` and MaxSyncStandbyLag` are required for PostgreSQL 10 and later.
MaxSyncStandbyLag	No	Integer	Maximum delay for sync standby server. If the delay time for standby server and the data lag are both less than or equals to the value of `MaxSyncStandbyLag` and `MaxSyncStandbyLatency` respectively, the standby server adopts sync replication mode; if not, it adopts async replication. This value is only valid for the instance with `SyncMode` set to `Semi-sync`. When the semi-sync replication mode of the instance is not allowed to downgrade to async replication, `MaxSyncStandbyLatency` and `MaxSyncStandbyLag` are not required. When the semi-sync instance is allowed to downgrade to async replication, `MaxSyncStandbyLatency` is required and `MaxSyncStandbyLag` must be left empty for PostgreSQL 9; `MaxSyncStandbyLatency` and MaxSyncStandbyLag` are required for PostgreSQL 10 and later.

3. Output Parameters

Parameter Name	Type	Description
RequestId	String	The unique request ID, generated by the server, will be returned for every request (if the request fails to reach the server for other reasons, the request will not obtain a RequestId). RequestId is required for locating a problem.

4. Example

Example1 Modifying the replication mode to be async

This example shows you how to set the primary-standby replication mode to be async and the maximum delay for switch.

Input Example

POST / HTTP/1.1
Host: postgres.tencentcloudapi.com
Content-Type: application/json
X-TC-Action: ModifyDBInstanceHAConfig
<Common request parameters>

{
    "DBInstanceId": "postgres-32d4mmv9",
    "SyncMode": "Async",
    "MaxStandbyLatency": 10737418240,
    "MaxStandbyLag": 10
}

Output Example

{
    "Response": {
        "RequestId": "c4676122-1694-4d0f-8b03-a33b4e1bd850"
    }
}

Example2 Modifying the replication mode to be semi-sync (downgradable to async)

This example shows you how to set the primary-standby replication mode to be semi-sync (downgradable to async) and the maximum delay for switch.

Input Example

POST / HTTP/1.1
Host: postgres.tencentcloudapi.com
Content-Type: application/json
X-TC-Action: ModifyDBInstanceHAConfig
<Common request parameters>

{
    "DBInstanceId": "postgres-32d4mmv9",
    "SyncMode": "Semi-sync",
    "MaxStandbyLatency": 10737418240,
    "MaxStandbyLag": 10,
    "MaxSyncStandbyLatency": 1073741824,
    "MaxSyncStandbyLag": 5
}

Output Example

{
    "Response": {
        "RequestId": "34c1d54c-ea3e-4594-8a5d-1b739123949d"
    }
}

Example3 Modifying the replication mode to be semi-sync (non-downgradable to async)

This example shows you how to set the primary-standby replication mode to be semi-sync (non-downgradable to async) and the maximum delay for switch.

Input Example

POST / HTTP/1.1
Host: postgres.tencentcloudapi.com
Content-Type: application/json
X-TC-Action: ModifyDBInstanceHAConfig
<Common request parameters>

{
    "DBInstanceId": "postgres-32d4mmv9",
    "SyncMode": "Semi-sync",
    "MaxStandbyLatency": 10737418240,
    "MaxStandbyLag": 10
}

Output Example

{
    "Response": {
        "RequestId": "9b923bd9-6a3b-482a-945d-ea2e6f2a9f17"
    }
}

5. Developer Resources

SDK

TencentCloud API 3.0 integrates SDKs that support various programming languages to make it easier for you to call APIs.

Command Line Interface

Tencent Cloud CLI 3.0

6. Error Code

The following only lists the error codes related to the API business logic. For other error codes, see Common Error Codes.

Error Code	Description
FailedOperation.DatabaseAccessError	Failed to access database management service. Please try again later. If the problem persists, please contact customer service.
FailedOperation.FailedOperationError	Operation failed. Please try again later.
InvalidParameter.ParameterCheckError	Failed to check the parameter.
InvalidParameter.ParametersNotSet	You can't left all parameters empty.You need to set at least one of the parameters.
InvalidParameterValue.InvalidParameterValueError	Incorrect parameter value
InvalidParameterValue.ParameterOutOfRange	Invalid parameter
OperationDenied.CamDeniedError	This operation cannot be performed.
OperationDenied.InstanceStatusLimitError	This operation cannot be performed on an instance in this status.
ResourceNotFound.InstanceNotFoundError	The instance does not exist.

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