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Elastic Compute Service:Enable or disable the unlimited mode

Last Updated:Oct 13, 2023

Burstable instances support the standard and unlimited modes to suit the requirements of different business scenarios. This topic describes how to view the performance mode of a burstable instance and enable or disable the unlimited mode for the instance.

Background information

  • The performance of a burstable instance in standard mode is limited by the availability of its CPU credits. After the initial credits and CPU credit balance of the instance are depleted, the instance is unable to burst beyond its performance baseline.

  • The performance of a burstable instance in unlimited mode is not subject to the availability of CPU credits. You can overdraw or purchase additional CPU credits to obtain performance boosts anytime.

Important

In unlimited mode, you may be charged for the additional CPU credits that burstable instances spend to burst performance. For more information, see Additional fees.

In the following scenarios, the system selects or switches the performance mode for a burstable instance:

  • By default, the standard mode is enabled for new burstable instances.

  • If a burstable instance is in the Stopped state and economical mode, the instance runs in standard mode after the instance is restarted.

  • If a burstable instance is in the Stopped state and is not in economical mode, the performance mode used before the instance is stopped continues to take effect after the instance is restarted.

  • If you have overdue payments in your account, the unlimited mode is automatically disabled for burstable instances and is not re-enabled until you complete the payments.

View 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. In the upper-left corner of the top navigation bar, select a region. 地域

  4. (Optional) If the Unlimited Mode column is not displayed on the Instances page, perform the following operations to show the column:

    1. Click the 自定义列表项 icon in the upper-right corner.

    2. In the Columns Not Displayed section, find the Unlimited Mode option and click the plus sign (+) on the right side to add the option to the Columns Displayed section. Then, click Continue.

  5. In the Unlimited Mode column, view the performance mode of a burstable instance.

    • Disabled indicates that the instance runs in standard mode.

    • Enabled indicates that the instance runs in unlimited mode.

Enable the unlimited mode

If a burstable instance runs in standard mode, you can enable the unlimited mode for the instance.

Note

Make sure that the burstable instance is in the Running state. Otherwise, you cannot switch the performance mode for the instance.

  1. Log on to the ECS console.

  2. In the left-side navigation pane, choose Instances & Images > Instances.

  3. Find a burstable instance that runs in standard mode 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 Attributes > Enable Unlimited Mode in the Actions column corresponding to the instance.开启

    • To enable the unlimited mode for one or more burstable instances at a time, select the instances and choose More > Instance Attributes > Enable Unlimited Mode in the lower part of the Instances page.

  4. In the Enable Unlimited Mode dialog box, select I am aware of the costs and risks. and click OK.

Disable the unlimited mode

If a burstable instance runs in unlimited mode, you can disable the unlimited mode for the instance.

Note

Make sure that the burstable instance is in the Running state. Otherwise, you cannot switch the performance mode for the instance.

  1. Log on to the ECS console.

  2. In the left-side navigation pane, choose Instances & Images > Instances.

  3. Find a burstable instance that runs in unlimited mode and use one of the following methods to disable the unlimited mode for the instance:

    • To disable the unlimited mode for a single instance, choose More > Instance Attributes > Disable Unlimited Mode in the Actions column corresponding to the instance.关闭

    • To disable the unlimited mode for one or more burstable instances at a time, select the instances and choose More > Instance Attributes > Disable Unlimited Mode in the lower part of the Instances page.

  4. In the Disable Unlimited Mode message, click OK.