DescribeMetricLast -

Limits

Each API operation can be called up to 50 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

This topic provides an example on how to query the latest monitoring data of the CPUUtilization metric for Elastic Compute Service (ECS). The namespace of ECS is acs_ecs_dashboard. The returned result indicates that the monitoring data for the instance i-abcdefgh12**** of the account 123456789876**** is queried at an interval of 60 seconds. The maximum, minimum, and average values of the metric are 100, 93.1, and 99.52, respectively.

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	DescribeMetricLast	The operation that you want to perform. Set the value to DescribeMetricLast.
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	CPUUtilization	The metric that is used to monitor the cloud service. For more information about metric names, 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	2019-01-31 10:00:00	The start of the time range to query monitoring data.
EndTime	String	No	2019-01-31 10:10:00	The end of the time range to query monitoring data. For second-level data, the start time is obtained by comparing the time that is specified by the StartTime parameter and 20 minutes earlier of the time that is specified by the EndTime parameter. The earlier one of the compared points in time is used as the start time. For minute-level data, the start time is obtained by comparing the time that is specified by the StartTime parameter and 2 hours earlier of the time that is specified by the EndTime parameter. The earlier one of the compared points in time is used as the start time. For hour-level data, the start time is obtained by comparing the time that is specified by the StartTime parameter and two days earlier of the time that is specified by the EndTime parameter. The earlier one of the compared points in time is used as the start time.
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.
NextToken	String	No	15761432850009dd70bb64cff1f0fff6c0b08ffff073be5fb1e785e2b020f7fed9b5e137bd810a6d6cff5ae****	The pagination token. If the number of results exceeds the maximum number of entries allowed on a single page, a pagination token is returned. This token can be used as an input parameter to obtain the next page of results. If all results are obtained, no token is returned.
Length	String	No	1000	The number of entries per page. Default value: 1000. This value indicates that a maximum of 1,000 entries of monitoring data can be returned on each page. Note The maximum value of the Length parameter in a request is 1440.
Express	String	No	{"groupby":["userId","instanceId"]}	The expression that is used to calculate the query results in real time.

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

Response parameters


Parameter	Type	Example	Description
NextToken	String	xxxxxx	The pagination token.
RequestId	String	021472A6-25E3-4094-8D00-BA4B6A5486C3	The request ID.
Success	Boolean	true	Indicates whether the request was successful. Valid values: true false
Datapoints	String	[{"timestamp":1548777660000,"userId":"123456789876**","instanceId":"i-abcdefgh12**","Minimum":93.1,"Average":99.52,"Maximum":100}]	The monitoring data.
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.
Period	String	60	The time interval. Unit: seconds.

Examples

Sample requests

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

Sample success responses

XML format

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

<QueryMetricListResponse>
	<Period>60</Period>
	<Datapoints>
		<timestamp>1548777660000</timestamp>
		<Maximum>100</Maximum>
		<userId>123456789876****</userId>
		<Minimum>93.1</Minimum>
		<instanceId>i-abcdefgh12****</instanceId>
		<Average>99.52</Average>
	</Datapoints>
	<RequestId>6A5F022D-AC7C-460E-94AE-B9E75083D027</RequestId>
	<Success>true</Success>
	<Code>200</Code>
</QueryMetricListResponse>

JSON format

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

{
  "Period" : "60",
  "Datapoints" : [ {
    "timestamp" : 1548777660000,
    "Maximum" : 100,
    "userId" : "123456789876****",
    "Minimum" : 93.1,
    "instanceId" : "i-abcdefgh12****",
    "Average" : 99.52
  } ],
  "RequestId" : "6A5F022D-AC7C-460E-94AE-B9E75083D027",
  "Success" : true,
  "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.