A burstable instance can run in standard or unlimited mode. This topic describes how to query and switch the performance mode of a burstable instance.

Background information

If a burstable instance in standard mode does not have initial credits and exhausts its CPU credit balance, the instance will be unable to burst beyond its performance baseline. If a burstable instance in unlimited mode depletes its CPU credit balance, the instance can spend advance or overdraft CPU credits to burst beyond its performance baseline. In this case, you may be billed for the consumption of these CPU credits. For more information, see Unlimited mode.
  • By default, the standard mode is enabled for newly created burstable instances.
  • If a burstable instance is in the Stopped state and the No Fees for Stopped Instances (VPC-Connected) feature is enabled, the instance runs in the standard mode by default after it is started.
  • If a burstable instance is in the Stopped state and the No Fees for Stopped Instances (VPC-Connected) feature is not enabled, the performance mode used before the instance is stopped will continue to take effect after the instance is started.
  • If your account has overdue payments, the unlimited mode will be disabled for bustable instances automatically and will not be re-enabled until you settle the payments.

Query the performance mode of a burstable instance

  1. Log on to the ECS console.
  2. In the left-side navigation pane, choose Instances & Images > Instances.
  3. Optional:If the Unlimited Mode column is not displayed on the Instances page, configure the column to be displayed.
    1. Click the Configure the column to be displayed icon in the upper-right corner.
      Column Filters icon
    2. In the Column Filters dialog box that appears, select Unlimited Mode and click OK.
  4. Find the target burstable instance and view the value in the Unlimited Mode column.
    • Disabled: indicates that the instance is in standard mode.
    • Enabled: indicates that the instance is in unlimited mode.

Enable the unlimited mode

Prerequisites:
  • The target burstable instance is in the Running state.
  • The burstable instance is in standard mode.

To enable the unlimited mode for a burstable instance, perform the following operations:

  1. Log on to the ECS console.
  2. In the left-side navigation pane, choose Instances & Images > Instances.
  3. Find the target burstable instance and use one of the following methods to enable the unlimited mode for the instance:
    • To enable the unlimited mode for a single burstable instance, choose More > Instance Settings > Enable Unlimited Mode from the Actions column corresponding to the instance.
    • To enable the unlimited mode for one or more burstable instances, select the target instances and choose More > Instance Settings > Enable Unlimited Mode at the lower-left corner of the Instances page.
  4. In the Enable Unlimited Mode message that appears, click OK.

Disable the unlimited mode

Prerequisites:
  • The target burstable instance is in the Running state.
  • The burstable instance is in unlimited mode.

To disable the unlimited mode for a burstable instance, perform the following operations:

  1. Log on to the ECS console.
  2. In the left-side navigation pane, choose Instances & Images > Instances.
  3. Find the target burstable instance and use one of the following methods to disable the unlimited mode for the instance:
    • To disable the unlimited mode for a single burstable instance, choose More > Instance Settings > Disable Unlimited Mode from the Actions column corresponding to the instance.
    • To disable the unlimited mode for one or more burstable instances, select the target instances and choose More > Instance Settings > Disable Unlimited Mode at the lower-left corner of the Instances page.
  4. In the Disable Unlimited Mode message that appears, click OK.