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PolarDB:ModifyParameter

Last Updated:Sep 10, 2026

Modifies instance parameters, including parameters at the compute layer and storage layer.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

polardbx:ModifyParameter

none

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

RegionId

string

Yes

The region ID.

cn-hangzhou

DBInstanceId

string

Yes

The instance ID.

pxc-hzjasdyuoo

ParamLevel

string

No

The parameter type. Valid values:

  • compute: compute layer parameter.

  • storage: storage layer parameter.

compute

Parameters

string

No

A JSON-formatted string. MapKey specifies the parameter name, and MapValue specifies the parameter value. The modifiable parameters are dynamically added or removed. Call the DescribeParameterTemplates operation to query the available parameters. You can specify multiple parameters at a time.

{"CONN_POOL_BLOCK_TIMEOUT":6000}

ClientToken

string

No

The client request token. You can set this parameter to any unique string.

FEA5DC20-6D8A-5979-97AA-FC57546ADC20

ParameterGroupId

string

No

Response elements

Element

Type

Description

Example

object

RequestId

string

The request ID.

FEA5DC20-6D8A-5979-97AA-FC57546ADC20

Examples

Success response

JSON format

{
  "RequestId": "FEA5DC20-6D8A-5979-97AA-FC57546ADC20"
}

Error codes

HTTP status code

Error code

Error message

Description

404 InvalidDBInstance.NotFound The specified DB instance does not exist.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.