All Products
Search
Document Center

:ModifyCronJobPolicyServerless

Last Updated:Sep 18, 2025

Modifies the policy for a scheduled task.

Try it now

Try this API in OpenAPI Explorer, no manual signing needed. Successful calls auto-generate SDK code matching your parameters. Download it with built-in credential security for local usage.

Test

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

polardb:ModifyCronJobPolicyServerless

update

*All Resource

*

 None None

Request parameters

Parameter

Type

Required

Description

Example
DBClusterId

string

Yes

The cluster ID.

pc-************
RegionId

string

Yes

The region ID.

cn-hangzhou
CronExpression

string

Yes

The Cron expression.

0 0 13 * * ?
ScaleMin

string

No

The minimum number of PolarDB Capacity Units (PCUs). Valid values: 0.25 to 32. This value must be less than or equal to the value of ScaleMax.

1
ScaleMax

string

No

The maximum number of PCUs. Valid values: 1 to 32.

12
ScaleRoNumMin

string

No

The minimum number of read-only nodes for scaling. Valid values: 0 to 15.

2
ScaleRoNumMax

string

No

The maximum number of read-only nodes for scaling. Valid values: 0 to 15.

4
AllowShutDown

string

No

Specifies whether to enable No-activity Suspension. Valid values:

  • true: Enables the feature.

  • false (default): Disables the feature.

true
SecondsUntilAutoPause

string

No

The detection period for No-activity Suspension. Unit: minutes. Valid values: 5 to 1440. The value must be a multiple of 5.

10
ScaleApRoNumMin

string

No

The minimum number of read-only column store nodes. Valid values: 0 to 15.

1
ScaleApRoNumMax

string

No

The maximum number of read-only column store nodes. Valid values: 0 to 15.

1
ServerlessRuleCpuEnlargeThreshold

string

No

The CPU utilization threshold for a scale-up. Unit: percent. Valid values: 40 to 100.

80
ServerlessRuleCpuShrinkThreshold

string

No

The CPU utilization threshold for a scale-down. Unit: percent. Valid values: 10 to 100. The value of ServerlessRuleCpuEnlargeThreshold minus the value of this parameter must be greater than or equal to 30.

25
ServerlessRuleMode

string

No

The scaling sensitivity. Valid values:

  • normal

  • flexible

normal
StartTime

string

No

The start time. Specify the time in the yyyy-MM-ddTHH:mm:ssZ format. The time must be in UTC.

2020-09-23T01:00:00Z
EndTime

string

Yes

The end time.

2020-02-12T15:00Z
JobId

string

No

The ID of the scheduled task.

8006e51c-dab3-4602-bc69-4f728002c6ce

Response elements

Element

Type

Description

Example

object

The response body.

RequestId

string

The request ID.

D1401250-910B-57A6-8A6A-D9988A62B1CD

Examples

Success response

JSON format

{ "RequestId": "D1401250-910B-57A6-8A6A-D9988A62B1CD" }

Error codes

HTTP status code

Error code

Error message

Description
400 InvalidRegionId.Malformed The specified parameter RegionId is not valid. The specified RegionId parameter is invalid.
400 InvalidStartTime.Malformed The specified parameter StartTime is not valid. The specified StartTime parameter is invalid.
400 InvalidEndTime.Malformed The specified parameter EndTime is not valid. The specified EndTime parameter is invalid.
400 InvalidCronJobParam.EndTime The specified endTime is not valid. The specified endTime is invalid.
400 InvalidCronJobParam.CronExpression The specified cronExpression is not valid. The specified cronExpression is not valid.
404 InvalidDBClusterId.Malformed The specified parameter DBClusterId is not valid. The specified DBClusterId parameter is invalid.
404 InvalidJobId.NotFound The Specified jobId does not found. The Specified jobId does not found.
409 InvalidCronJob.DuplicateJob This instance has tasks with duplicate crontab expressions. This instance has tasks with duplicate crontab expressions.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.