Help Center/ Data Warehouse Service/ API Reference/ API Description/ Host Monitoring/ Querying Collected Data of a Specified Metric
Updated on 2026-06-22 GMT+08:00

Querying Collected Data of a Specified Metric

Function

This API is used to query the collected data of a specified metric.

Calling Method

For details, see Calling APIs.

URI

GET /v1/{project_id}/clusters/{cluster_id}/dms/metrics/{metric_name}

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Definition

Project ID. To obtain the value, see Obtaining a Project ID.

Constraints

N/A

Range

N/A

Default Value

N/A

cluster_id

Yes

String

Definition

Cluster ID. For details about how to obtain the value, see Obtaining the Cluster ID.

Constraints

The value must be a valid DWS cluster ID.

Range

It is a 36-digit UUID.

Default Value

N/A

metric_name

Yes

String

Definition

Metric name.

Constraints

N/A

Range

N/A

Default Value

N/A

Table 2 Query Parameters

Parameter

Mandatory

Type

Description

offset

Yes

Integer

Definition

Page offset, which starts from 0 (page number minus 1).

Constraints

N/A

Range

Greater than or equal to 0

Default Value

0

limit

Yes

Integer

Definition

Size of a single page.

Constraints

N/A

Range

Greater than 0 and less than or equal to 1000

Default Value

No limit.

from

Yes

Long

Definition

Start time of the collection. Its value is a 13-digit timestamp.

Constraints

N/A

Range

The value is a 13-digit timestamp.

Default Value

N/A

to

Yes

Long

Definition

End time of the collection. Its value is a 13-digit timestamp.

Constraints

The interval between the start time and end time cannot exceed one day.

Range

The value is a 13-digit timestamp.

Default Value

N/A

order_by

No

String

Definition

Sorting field. The value is fixed.

Constraints

N/A

Range

ctime: collection time

Default Value

N/A

sort_by

No

String

Definition

Description request.

Constraints

Whether the order is ascending or descending. The value is fixed.

Range

asc

desc

Default Value

N/A

Request Parameters

None

Response Parameters

Status code: 200

Table 3 Response body parameters

Parameter

Type

Description

code

Integer

Definition

Response code.

Range

N/A

msg

String

Definition

Response information.

Range

N/A

data

Array of Map<String,Object> objects

Definition

List of collected metric data.

Range

N/A

count

Long

Definition

Total number of rows in the list.

Range

N/A

Example Requests

https://{Endpoint}/v1/{project_id}/clusters/{cluster_id}/dms/metrics/TableDirtyPageRate?limit=1&offset=0&from=1701914324000&to=1701942194000&order_by=ctime&sort_by=desc

Example Responses

Status code: 200

Collected data of the metric queried.

{
  "code" : 0,
  "msg" : "OK",
  "data" : [ {
    "table_size" : 40960,
    "virtual_cluster_id" : 53,
    "db_name" : "postgres",
    "ctime" : 1701929836000,
    "table_owner" : "Ruby",
    "schema_name" : "pmk",
    "table_name" : "pmk_meta_data",
    "dirty_page_rate" : 0.8
  } ],
  "count" : 3
}

SDK Sample Code

The SDK sample code is as follows.

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package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.dws.v2.region.DwsRegion;
import com.huaweicloud.sdk.dws.v2.*;
import com.huaweicloud.sdk.dws.v2.model.*;


public class ListMetricsDataSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");
        String projectId = "{project_id}";

        ICredential auth = new BasicCredentials()
                .withProjectId(projectId)
                .withAk(ak)
                .withSk(sk);

        DwsClient client = DwsClient.newBuilder()
                .withCredential(auth)
                .withRegion(DwsRegion.valueOf("<YOUR REGION>"))
                .build();
        ListMetricsDataRequest request = new ListMetricsDataRequest();
        request.withClusterId("{cluster_id}");
        request.withMetricName("{metric_name}");
        try {
            ListMetricsDataResponse response = client.listMetricsData(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}
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# coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkdws.v2.region.dws_region import DwsRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkdws.v2 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]
    projectId = "{project_id}"

    credentials = BasicCredentials(ak, sk, projectId)

    client = DwsClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(DwsRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = ListMetricsDataRequest()
        request.cluster_id = "{cluster_id}"
        request.metric_name = "{metric_name}"
        response = client.list_metrics_data(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)
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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    dws "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")
    projectId := "{project_id}"

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        WithProjectId(projectId).
        Build()

    client := dws.NewDwsClient(
        dws.DwsClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.ListMetricsDataRequest{}
	request.ClusterId = "{cluster_id}"
	request.MetricName = "{metric_name}"
	response, err := client.ListMetricsData(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.

Status Codes

Status Code

Description

200

Collected data of the metric queried.

400

Request error.

401

Authentication failed.

403

No operation permissions.

500

Internal server error.

503

Service unavailable.