DescribeMetricData -

Limits

Each API operation can be called up to 10 times per second. An Alibaba Cloud account and the RAM users within the account share the quota.

Precautions

The storage duration of the monitoring data of each cloud service is related to the Period parameter (statistical period). A larger value of the Period parameter indicates that the queried monitoring data is distributed in a larger time range and the storage duration of the monitoring data is longer. The following list describes the specific relationships:

If the value of the Period parameter is less than 60 seconds, the storage duration is seven days.
If the value of the Period parameter is 60 seconds, the storage duration is 31 days.
If the value of the Period parameter is 300 seconds, the storage duration is 91 days.

Usage notes

Note Different from DescribeMetricList, the DescribeMetricData operation provides statistical features. You can set the Dimension parameter to {"instanceId": "i-abcdefgh12****"} to aggregate all data of your Alibaba Cloud account.

This topic provides an example on how to query the monitoring data of the cpu_idle metric for Elastic Compute Service (ECS). The namespace of ECS is acs_ecs_dashboard.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters


Parameter	Type	Required	Example	Description
Action	String	Yes	DescribeMetricData	The operation that you want to perform. Set the value to DescribeMetricData.
Namespace	String	Yes	acs_ecs_dashboard	The namespace of the cloud service. For more information about the namespaces of cloud services, see Appendix 1: Metrics.
MetricName	String	Yes	cpu_idle	The metric that is used to monitor the cloud service. For more information about the metrics of cloud services, see Appendix 1: Metrics.
Period	String	No	60	The statistical period of the monitoring data. Valid values: 15, 60, 900, and 3600. Unit: seconds. Note If this parameter is not specified, monitoring data is queried based on the period in which metric values are reported. Statistical periods vary based on the metrics that are specified by `MetricName`. For more information, see Appendix 1: Metrics.
StartTime	String	No	1618368900000	The start of the time range to query monitoring data. If the `StartTime` and `EndTime` parameters are not specified, the monitoring data of the last statistical period is queried. If the `StartTime` and `EndTime` parameters are specified, the monitoring data of the last statistical period in the specified time range is queried. The following examples demonstrate how to determine the period in which monitoring data is queried: If you set the `Period` parameter to 15, the specified time range must be less than or equal to 20 minutes. For example, if you set the StartTime parameter to 2021-05-08 08:10:00 and the EndTime parameter to 2021-05-08 08:30:00, the monitoring data of the last 15 seconds in the time range is queried. If you set the `Period` parameter to 60 or 900, the specified time range must be less than or equal to 2 hours. For example, if you set the Period parameter to 60, the StartTime parameter to 2021-05-08 08:00:00, and the EndTime parameter to 2021-05-08 10:00:00, the monitoring data of the last 60 seconds in the time range is queried. If you set the `Period` parameter to 3600, the specified time range must be less than or equal to two days. For example, if you set the StartTime parameter to 2021-05-08 08:00:00 and the EndTime parameter to 2021-05-10 08:00:00, the monitoring data of the last 3,600 seconds in the time range is queried. The following formats are supported: UNIX timestamp: the number of milliseconds that have elapsed since 00:00:00 Thursday, January 1, 1970 Time format: YYYY-MM-DDThh:mm:ssZ Note You must set the `StartTime` parameter to a point in time that is later than 00:00:00 Thursday, January 1, 1970. Otherwise, this parameter is invalid. We recommend that you use UNIX timestamps to prevent time zone-related issues.
EndTime	String	No	1618368960000	The end of the time range to query monitoring data. If the `StartTime` and `EndTime` parameters are not specified, the monitoring data of the last statistical period is queried. If the `StartTime` and `EndTime` parameters are specified, the monitoring data of the last statistical period in the specified time range is queried. The following examples demonstrate how to determine the period in which monitoring data is queried: If you set the `Period` parameter to 15, the specified time range must be less than or equal to 20 minutes. For example, if you set the StartTime parameter to 2021-05-08 08:10:00 and the EndTime parameter to 2021-05-08 08:30:00, the monitoring data of the last 15 seconds in the time range is queried. If you set the `Period` parameter to 60 or 900, the specified time range must be less than or equal to 2 hours. For example, if you set the Period parameter to 60, the StartTime parameter to 2021-05-08 08:00:00, and the EndTime parameter to 2021-05-08 10:00:00, the monitoring data of the last 60 seconds in the time range is queried. If you set the `Period` parameter to 3600, the specified time range must be less than or equal to two days. For example, if you set the StartTime parameter to 2021-05-08 08:00:00 and the EndTime parameter to 2021-05-10 08:00:00, the monitoring data of the last 3,600 seconds in the time range is queried. The following formats are supported: UNIX timestamp: the number of milliseconds that have elapsed since 00:00:00 Thursday, January 1, 1970 Time format: YYYY-MM-DDThh:mm:ssZ Note We recommend that you use UNIX timestamps to prevent time zone-related issues.
Dimensions	String	No	[{"instanceId":"i-2ze2d6j5uhg20x47****"}]	The monitoring dimensions of the specified resource. Set the value to a collection of `key:value` pairs. Example: `{"userId":"120886317861**"}` or `{"instanceId":"i-2ze2d6j5uhg20x47"}`. Note** You can query a maximum of 50 instances in a single request.
Express	String	No	{"groupby":["userId","instanceId"]}	The expression that is used to compute the query results in real time. Note Only the `groupby` expression is supported. This expression is similar to the `GROUP BY` statement that is used in databases.
Length	String	No	1000	The number of entries per page. Default value: 1000. Note The maximum value of the Length parameter in a request is 1440.

For more information about common request parameters, see Common parameters.

Response parameters


Parameter	Type	Example	Description
Code	String	200	The status code. Note The status code 200 indicates that the request was successful.
Message	String	The specified resource is not found.	The error message.
RequestId	String	6A5F022D-AC7C-460E-94AE-B9E75083D027	The request ID.
Datapoints	String	[{\"timestamp\":1618368900000,\"Average\":95.8291666666667,\"Minimum\":65.48,\"Maximum\":100.0},{\"timestamp\":1618368960000,\"Average\":95.8683333333333,\"Minimum\":67.84,\"Maximum\":100.0}]	The monitoring data. The value includes the following fields: `timestamp`: the timestamp when the alert was triggered. `userId`: the ID of the user for which the alert was triggered. `instanceId`: the ID of the instance for which the alert was triggered. `Minimum`, `Average`, and `Maximum`: the aggregation methods.
Period	String	60	The statistical period of the monitoring data. Valid values: 15, 60, 900, and 3600. Unit: seconds.

Examples

Sample requests

http(s)://[Endpoint]/?Action=DescribeMetricData
&MetricName=cpu_idle
&Namespace=acs_ecs_dashboard
&<Common request parameters>

Sample success responses

XML format

HTTP/1.1 200 OK
Content-Type:application/xml

<DescribeMetricDataResponse>
	<RequestId>7598FEED-3B79-4B4A-AD01-435F34DA8EDC</RequestId>
	<Period>60</Period>	
    <Datapoints>[{\"timestamp\":1618368900000,\"Average\":95.8291666666667,\"Minimum\":65.48,\"Maximum\":100.0},{\"timestamp\":1618368960000,\"Average\":95.8683333333333,\"Minimum\":67.84,\"Maximum\":100.0}]</Datapoints>
	<Code>200</Code>
</DescribeMetricDataResponse>

JSON format

HTTP/1.1 200 OK
Content-Type:application/json

{
  "RequestId" : "7598FEED-3B79-4B4A-AD01-435F34DA8EDC",
  "Period" : "60",
  "Datapoints" : "[{\"timestamp\":1618368900000,\"Average\":95.8291666666667,\"Minimum\":65.48,\"Maximum\":100.0},{\"timestamp\":1618368960000,\"Average\":95.8683333333333,\"Minimum\":67.84,\"Maximum\":100.0}]",
  "Code" : "200"
}

Error codes


HTTP status code	Error code	Error message	Description
404	ResourceNotFound	The specified resource is not found.	The specified resource is not found.

For a list of error codes, see Service error codes.