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    E-MapReduce:Manage resource queues

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    E-MapReduce:Manage resource queues

    Last Updated:Jan 28, 2026

    Each workspace includes two default queues for running tasks: dev_queue and root_queue. To isolate and manage resources, you can add queues. This topic describes basic queue operations.

    Prerequisites

    You have created a workspace. For more information, see Manage workspaces.

    Add a queue

    Note

    You can add queues to isolate and manage resources. If you do not add a new resource queue, you can use the default dev_queue and root_queue to run tasks. If you purchase a subscription quota, the system creates a subscription_queue queue by default.

    1. Go to the Resource Management page.

      1. Log in to the E-MapReduce console.

      2. In the navigation pane on the left, choose EMR Serverless > Spark.

      3. On the Spark page, click the name of the target workspace.

      4. On the EMR Serverless Spark page, in the navigation pane on the left, click Resource Management.

    2. On the Queue Resources tab, click Add Queue.

    3. In the Add Queue dialog box, set the following parameters based on the billing method of the workspace and click OK.

      Pay-as-you-go

      Parameter

      Description

      Queue Name

      The queue name must be unique.

      Note

      You cannot change the Queue Name after the queue is added.

      Elastic Concurrency Limit (CU)

      The maximum number of compute units (CUs) that can run concurrently in the queue. Based on the configuration of the session instance, set the concurrency limit of the selected deployment queue to at least 3 CU.

      To adjust the concurrency limit for other queues, see Adjust queue resources.

      Application Environment

      • Development: An environment where developers write, test, and debug code. It usually includes an integrated development environment (IDE), a versioning system, and various debugging tools for developers to build and debug software.

      • Production: The actual running environment for users. It provides stable, efficient, and secure services.

      Subscription

      Parameter

      Description

      Queue Name

      The queue name must be unique.

      Note

      You cannot change the Queue Name after the queue is added.

      Fixed Resource Quota (CU)

      The maximum amount of resources is determined by the remaining subscription quota of the current workspace. If the remaining subscription quota is insufficient, you can adjust it in one of the following ways:

      Application Environment

      • Development: An environment where developers write, test, and debug code. It usually includes an IDE, a versioning system, and various debugging tools for developers to build and debug software.

      • Production: The actual running environment for users. It provides stable, efficient, and secure services.

      Hybrid billing

      Parameter

      Description

      Queue Name

      The queue name must be unique.

      Note

      You cannot change the Queue Name after the queue is added.

      Elastic Concurrency Limit (CU)

      The maximum number of CUs that can run concurrently in the queue. Based on the configuration of the session instance, set the concurrency limit of the selected deployment queue to at least 3 CU.

      To adjust the concurrency limit for other queues, see Adjust queue resources.

      Fixed Resource Quota (CU)

      The maximum amount of resources is determined by the remaining subscription quota of the current workspace. If the remaining subscription quota is insufficient, you can adjust it in the following way:

      Adjust the resource amount of other queues. For more information, see Adjust queue resources.

      Application Environment

      • Development: An environment where developers write, test, and debug code. It usually includes an IDE, a versioning system, and various debugging tools for developers to build and debug software.

      • Production: The actual running environment for users. It provides stable, efficient, and secure services.

    Edit a queue

    Adjust queue resources

    Follow the steps for the billing method of your workspace.

    Pay-as-you-go

    1. On the Queue Resources tab of the Resource Management page, click Edit Queue in the Actions column of the target queue.

    2. On the Resources tab of the Edit Queue dialog box, adjust the Elastic Concurrency Limit (CU).

    3. Click OK.

    Subscription

    1. On the Queue Resources tab of the Resource Management page, click Edit Queue in the Actions column of the target queue.

    2. On the Resources tab of the Edit Queue dialog box, adjust the Fixed Resource Quota (CU).

    3. Click OK.

    Hybrid billing

    1. On the Queue Resources tab of the Resource Management page, click Edit Queue in the Actions column of the target queue.

    2. On the Resources tab of the Edit Queue dialog box, adjust the Fixed Resource Quota (CU) and Elastic Concurrency Limit (CU).

    3. Click OK.

    Edit queue permissions

    1. On the Queue Resources tab of the Resource Management page, click Edit Queue in the Actions column of the target queue.

    2. In the Edit Permission dialog box, click the Permission tab.

    3. Add, modify, or remove users and their permissions.

    4. Click OK.

    Delete a queue

    Important

    • You cannot delete the root_queue.

    • Before you delete a resource queue, make sure that it is not associated with any tasks in the workspace. Otherwise, all associated tasks will be affected.

    1. On the Queue Resources tab of the Resource Management page, click Delete in the Actions column of the target queue.

    2. In the Delete Queue dialog box, click Delete Queue.

    References