Help Center/ TaurusDB/ API Reference/ APIs (Recommended)/ Traffic Management/ Querying User Session Threads on a Node
Updated on 2026-01-05 GMT+08:00

Querying User Session Threads on a Node

Function

This API is used to query user session threads on a TaurusDB node by page, similar to the show processlist command. Internal session threads are not returned. Before calling this API:

Calling Method

For details, see Calling APIs.

Authorization Information

Each account has all the permissions required to call all APIs, but IAM users must be assigned the required permissions.

  • If you are using role/policy-based authorization, see Permissions and Supported Actions for details on the required permissions.
  • If you are using identity policy-based authorization, the following identity policy-based permissions are required.

    Action

    Access Level

    Resource Type (*: required)

    Condition Key

    Alias

    Dependency

    gaussdbformysql:instance:listProcesses

    List

    instance *

    • g:EnterpriseProjectId

    • g:ResourceTag/<tag-key>

    gaussdb:instance:listProcesses

    -

URI

GET /v3/{project_id}/instances/{instance_id}/nodes/{node_id}/processes

Table 1 URI parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Definition

Project ID of a tenant in a region.

To obtain this value, see Obtaining a Project ID.

Constraints

N/A

Range

The value contains 32 characters. Only letters and digits are allowed.

Default Value

N/A

instance_id

Yes

String

Definition

Instance ID, which uniquely identifies an instance.

Constraints

N/A

Range

The value contains 36 characters with a suffix of in07. Only letters and digits are allowed.

Default Value

N/A

node_id

Yes

String

Definition

Node ID, which uniquely identifies a node.

Constraints

N/A

Range

The value contains 36 characters with a suffix of no07. Only letters and digits are allowed.

Default Value

N/A

Table 2 Query parameters

Parameter

Mandatory

Type

Description

offset

No

Integer

Definition

Index offset. The query starts from the next piece of data indexed by this parameter.

Constraints

The value cannot be a negative number.

Range

≥ 0

Default Value

0

limit

No

Integer

Definition

Number of records to be queried.

Constraints

The value cannot be a negative number.

Range

1–100

Default Value

100

Request Parameters

Table 3 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

Definition

User token.

To obtain this value, call the IAM API for obtaining a user token.

The value of X-Subject-Token in the response header is the token value.

Constraints

N/A

Range

N/A

Default Value

N/A

X-Language

No

String

Definition

Request language type.

Constraints

N/A

Range

  • en-us

  • zh-cn

Default Value

en-us

Response Parameters

Status code: 200

Table 4 Response body parameters

Parameter

Type

Description

processes

Array of TaurusDbProcessInfo objects

Definition

User session threads.

total_count

Integer

Definition

Total number of user session threads on a node.

Range

≥ 0

Table 5 TaurusDbProcessInfo

Parameter

Type

Description

id

Long

Definition

ID of a user session thread.

user

String

Definition

User who starts the session thread.

host

String

Definition

Host and port that send requests.

db

String

Definition

Name of the database that is being accessed.

command

String

Definition

Command that is being executed.

time

Long

Definition

How many seconds the user session thread remains in the current state.

state

String

Definition

Status of the SQL statement that is being executed.

info

String

Definition

Additional information, which is usually the statement that is being executed.

Status code: 400

Table 6 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

Status code: 500

Table 7 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

Example Request

Querying the first 100 user session threads on a TaurusDB node

GET https://{endpoint}/v3/619d3e78f61b4be68bc5aa0b59edcf7b/instances/a23fb62bd61e4e9e9636fd2225f395bein07/nodes/18663926eacb443d98dc20f8620f28f2no07/processes?offset=0&limit=100

Example Response

Status code: 200

Success.

{
  "processes" : [ {
    "id" : 2075425,
    "user" : "root",
    "host" : "100.98.212.252:29285",
    "db" : null,
    "command" : "Query",
    "time" : 103,
    "state" : "User sleep",
    "info" : "select sleep(1000)"
  }, {
    "id" : 2075426,
    "user" : "root",
    "host" : "100.98.212.252:29285",
    "db" : null,
    "command" : "Query",
    "time" : 105,
    "state" : "User sleep",
    "info" : "show processlist"
  } ],
  "total_count" : 2
}

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.gaussdb.v3.region.GaussDBRegion;
import com.huaweicloud.sdk.gaussdb.v3.*;
import com.huaweicloud.sdk.gaussdb.v3.model.*;


public class ListTaurusDbNodeProcessesSolution {

    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);

        GaussDBClient client = GaussDBClient.newBuilder()
                .withCredential(auth)
                .withRegion(GaussDBRegion.valueOf("<YOUR REGION>"))
                .build();
        ListTaurusDbNodeProcessesRequest request = new ListTaurusDbNodeProcessesRequest();
        request.withInstanceId("{instance_id}");
        request.withNodeId("{node_id}");
        try {
            ListTaurusDbNodeProcessesResponse response = client.listTaurusDbNodeProcesses(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 huaweicloudsdkgaussdb.v3.region.gaussdb_region import GaussDBRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkgaussdb.v3 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 = GaussDBClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(GaussDBRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = ListTaurusDbNodeProcessesRequest()
        request.instance_id = "{instance_id}"
        request.node_id = "{node_id}"
        response = client.list_taurus_db_node_processes(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"
    gaussdb "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/gaussdb/v3/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 := gaussdb.NewGaussDBClient(
        gaussdb.GaussDBClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.ListTaurusDbNodeProcessesRequest{}
	request.InstanceId = "{instance_id}"
	request.NodeId = "{node_id}"
	response, err := client.ListTaurusDbNodeProcesses(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 Code

For details, see Status Codes.

Error Code

For details, see Error Codes.