Queries the latest monitoring data of a metric for a cloud service. The data can be sorted by a specified order.
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 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 monitoring data of the cpu_idle
metric in the last 60 seconds for Elastic Compute Service (ECS). The namespace of ECS is acs_ecs_dashboard
. The monitoring data is sorted in descending order based on the Average
field.
Debugging
Request parameters
Parameter | Type | Required | Example | Description |
---|---|---|---|---|
Action | String | Yes | DescribeMetricTop | The operation that you want to perform. Set the value to DescribeMetricTop. |
Period | String | No | 60 | The statistical period of the monitoring data. Valid values: 15, 60, 900, and 3600. Unit: seconds. Note
|
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 metric names, see Appendix 1: Metrics. |
StartTime | String | No | 2021-05-08 08:00:00 | The start of the time range to query monitoring data.
The following formats are supported:
Note
|
EndTime | String | No | 2021-05-08 10:00:00 | The end of the time range to query monitoring data.
The following formats are supported:
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 Note You can query a maximum of 50 instances in a single request. |
Orderby | String | Yes | Average | The field based on which data is sorted. Valid values:
|
OrderDesc | String | No | False | The order in which data is sorted. Valid values:
|
Length | String | No | 10 | The number of entries per page. Default value: 10. 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 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. |
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 | 3121AE7D-4AFF-4C25-8F1D-C8226EBB1F42 | The request ID. |
Datapoints | String | [{\"order\":1,\"timestamp\":1620287520000,\"userId\":\"120886317861****\",\"instanceId\":\"i-j6ccf7d5fn335qpo****\",\"Average\":99.92,\"Minimum\":99.5,\"Maximum\":100.0,\"_count\":1.0},{\"order\":2,\"timestamp\":1620287520000,\"userId\":\"120886317861****\",\"instanceId\":\"i-0xii2bvf42iqvxbp****\",\"Average\":99.91,\"Minimum\":99.0,\"Maximum\":100.0,\"_count\":1.0}] | The monitoring data. |
Period | String | 60 | The statistical period of the monitoring data. Unit: seconds. Valid values: 15, 60, 900, and 3600. |
Examples
Sample requests
http(s)://[Endpoint]/?Action=DescribeMetricTop
&MetricName=cpu_idle
&Namespace=acs_ecs_dashboard
&Period=60
&Orderby=Average
&OrderDesc=False
&<Common request parameters>
Sample success responses
XML
format
HTTP/1.1 200 OK
Content-Type:application/xml
<DescribeMetricTopResponse>
<RequestId>18DC44ED-B058-49B0-9D49-1D6608328E4D</RequestId>
<Period>60</Period>
<Datapoints>[{\"order\":1,\"timestamp\":1620287520000,\"userId\":\"120886317861****\",\"instanceId\":\"i-j6ccf7d5fn335qpo****\",\"Average\":99.92,\"Minimum\":99.5,\"Maximum\":100.0,\"_count\":1.0},{\"order\":2,\"timestamp\":1620287520000,\"userId\":\"120886317861****\",\"instanceId\":\"i-0xii2bvf42iqvxbp****\",\"Average\":99.91,\"Minimum\":99.0,\"Maximum\":100.0,\"_count\":1.0}]</Datapoints>
<Code>200</Code>
</DescribeMetricTopResponse>
JSON
format
HTTP/1.1 200 OK
Content-Type:application/json
{
"RequestId" : "18DC44ED-B058-49B0-9D49-1D6608328E4D",
"Period" : "60",
"Datapoints" : "[{\"order\":1,\"timestamp\":1620287520000,\"userId\":\"120886317861****\",\"instanceId\":\"i-j6ccf7d5fn335qpo****\",\"Average\":99.92,\"Minimum\":99.5,\"Maximum\":100.0,\"_count\":1.0},{\"order\":2,\"timestamp\":1620287520000,\"userId\":\"120886317861****\",\"instanceId\":\"i-0xii2bvf42iqvxbp****\",\"Average\":99.91,\"Minimum\":99.0,\"Maximum\":100.0,\"_count\":1.0}]",
"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.