Queries the changes to the parameters of a PolarDB-X instance.


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Request parameters

Parameter Type Required Example Description
Action String Yes DescribeModifyParameterLog

The operation that you want to perform. Set the value to DescribeModifyParameterLog.

RegionId String Yes cn-hangzhou

The region ID of the instance.

DBInstanceId String Yes pxc-uf6f012812v3a****

The ID of the instance.

ParamLevel String No compute

The parameter level. Valid values:

  • compute: the computing layer
  • storage: the storage layer
StartTime String Yes 2021-11-03T16:00Z

The beginning of the time range to query.

EndTime String Yes 2021-11-04T15:59

The end of the time range to query.

PageSize String No 20

The number of entries to return on each page.

PageNumber String No 1

The number of the page to return.

Response parameters

Parameter Type Example Description
RequestId String 90075C5C-55B6-52A7-B821-DBD59C7CAF77

The ID of the request.

PageNumber Integer 1

The page number of the returned page.

PageSize Integer 20

The number of entries returned per page.

ChangeLogs Array of ChangeLog
OldParameterValue String 50

The parameter value before the change.


The name of the parameter.

Synced Integer 1

Indicates whether the change is synchronized to nodes.

NewParameterValue String 30

The new value of the parameter.

ChangeTime String 2021-11-04T15:45

The time when the value was changed.


Sample requests

&<Common request parameters>

Sample success responses

XML format

HTTP/1.1 200 OK


JSON format

HTTP/1.1 200 OK

  "RequestId" : "90075C5C-55B6-52A7-B821-DBD59C7CAF77",
  "PageNumber" : 1,
  "PageSize" : 20,
  "ChangeLogs" : [ {
    "OldParameterValue" : "50",
    "ParameterName" : "CONN_POOL_IDLE_TIMEOUT",
    "Synced" : 1,
    "NewParameterValue" : "30",
    "ChangeTime" : "2021-11-04T15:45"
  } ]

Error codes

HttpCode Error code Error message Description
404 InvalidDBInstance.NotFound The specified DB instance does not exist. The error message returned because the specified PolarDB-X instance does not exist.

For a list of error codes, visit the API Error Center.