Instance quotas are allocated based on zones, instance types, billing methods, and network types. This topic describes the different types of instance quotas and how to view and increase instance quotas.

Background information

Instance quotas are classified into total quotas, reserved quotas, and base quotas based on the extent to which the provision of resources is guaranteed. Total quotas specify the maximum amounts of guaranteed available instance resources, whereas base quotas specify the minimum amounts of guaranteed available instance resources. To ensure that the automatic increases in your total quota match the increases in your daily resource usage, the system periodically adjusts your instance quotas based on your instance usage. If a total quota is insufficient for your requirements, you can apply to increase it.
Note Reserved quotas specify the amounts of instance resources reserved by elasticity assurances or immediate capacity reservations. For more information, see Overview of Resource Assurance.
Both the total and usage amounts of the total and base quotas are cumulative values of the last 15 days (including the current day). You do not need to apply for additional quotas when quotas are insufficient due to a large number of instances in your account. Examples:
  • When you query the total quota on August 16, the total amount displayed is the total quota for August 2 to August 16, and the displayed usage amount is the number of instances created and running from August 2 to August 16.
  • If the base quota remains constant and you have not applied for an increase to the total quota, the total quota remains unchanged when you query it on August 17. The displayed usage amount is the number of instances created and running from August 3 to August 17.
Note In some cases, it may take up to 24 hours to refresh and display usage data. However, this does not affect whether you can create instances.

In addition, an instance quota can be classified into an instance type-specific quota and a zone-specific vCPU-based total quota for all instance types. Typically, you do not need to worry about the zone-specific vCPU-based total quota for all instance types, because this value is always greater than your demand.

Step 1: View instance quotas

  1. Log on to the ECS console.
  2. In the upper-right corner of the Overview page, click Privileges.
    quota
  3. In the top navigation bar, select a region.
  4. Click the Instance Quota tab.
  5. View instance quota values.
    The following figure shows the Instance Quota page.Instance Quota
    The following table describes the columns in the list shown in the preceding figure.
    Column Description
    • Region/Zone
    • Instance Type
    • Billing Method
    • Network Type
    You can filter and view instance quotas by region, zone, instance type, billing method, and network type. Instance quotas are classified into the following types:
    • Instance type-specific quota: You can click Instance Type in the upper-left drop-down list to view the instance type-specific quota that specifies the quota for instances of a specified instance type and a specified network type that use a specified billing method in a specified region and zone.
      Note Quotas for instances of the classic network type are displayed only when the classic network is available in the region. You can check whether the classic network is available in the region on the Privileges tab.
    • Zone-specific vCPU-based total quota for all instance types: You can click All in the upper-left drop-down list to view the zone-specific vCPU-based total quota for all instance types that specifies the maximum number of vCPUs that can be assigned to instances of all instance types and a specified network type that use a specified billing method in a specified region and zone. For example, you can view the maximum number of vCPUs that can be assigned to VPC-type subscription instances of all instance types in Hangzhou Zone H.
    Quota Unit
    • Instance type-specific quota: The displayed value is the number of instances.
    • Zone-specific vCPU-based total quota for all instance types: The displayed value is the number of vCPUs.
    Total Quota Total quotas include base quotas, reserved quotas, and other quotas. Total quotas are automatically adjusted along with base quotas before the tenth day of each month.

    If the number of instances or vCPUs in your account reaches the total quota, you cannot purchase new instances. If you need more ECS instances, you can apply to increase the total quota.

    After the total quota is increased to the specified value, the system keeps the total quota from falling below this value when the system automatically adjusts the total quota within at least 30 days.

    Note When you create ECS instances beyond the base quota, the availability of required resources is not guaranteed.
    Reserved Quota Reserved quotas specify the amounts of instance resources reserved by resource reservations. When you create instances within a reserved quota, the requested resources are guaranteed. You can create the following resource reservations to increase reserved quotas:
    Base Quota Base quotas are automatically adjusted and allocated before the tenth day of each month based on the usage of your ECS resources. You cannot apply to increase the base quotas.
    Note The base quota is used preferentially when you create instances. When you create instances within the base quota, their corresponding resources are guaranteed to be available.
    In the Total Quota, Reserved Quota, and Base Quota columns, you can check the usage of quotas based on the color of the progress bar. Different colors convey different meanings:
    • Green: The usage is less than 80% of the total.
    • Yellow: The usage is greater than or equal to 80% but less than 100% of the total.
    • Red: The usage is 100% of the total.

Step 2: Increase instance quotas

  1. You can apply to increase quotas on demand.
    • Increase a single quota: Find the quota that you want to increase and click Increase Quota in the Actions column.
    • Increase multiple quotas at a time: Select one or more quotas, and click Calculate Quotas and Request in the lower part of the page
    Note You cannot apply to increase a quota while the previous increase application is in progress.
  2. On the Calculate Quotas and Request page, enter required information and then click Submit.
    Recommended quotas are displayed on the page. The request is submitted for fast and automatic approval first. If the request is rejected, it can be submitted again for manual approval.
    • Typically, a requested quota that is less than the recommended value can pass automatic approval.
    • A requested quota that is greater than the recommended value is likely to be rejected by automatic approval. If the request is rejected, you can submit it again for manual approval.
    Enter the required information based on your operation.
    • The following table describes the information that you must enter when you request to increase a single quota.
      Information Description
      Target Quota Enter your expected quota in the number of instances or vCPUs.
      Reason Enter the reason for your request. A proper reason makes it easier for your request to be approved.
      Notify Adjustment Results If you select Yes, the system notifies you of the adjustment results by email.
    • The following table describes the information that you must enter when you request to increase multiple quotas at a time.
      Information Description
      Target Quota You can set a total expected quota for your selected quotas. The system allocates a recommended value in the number of instances for each quota.
      New Quota You can also specify an expected value for each quota in the number of instances.
      Reason Enter the reason for your request. A proper reason makes it easier for your request to be approved.
      Notify Adjustment Results If you select Yes, the system notifies you of the adjustment results by email.
  3. In the message that appears, confirm the result of the quota increase operation.
  4. Click Quota Increase Requests in the Actions column to view the status of your request.
    • Approved: Your request is approved and cannot be revoked.
    • Forbid: Your request is rejected. You can click Submit Again in the Actions column and select Manual Approval.

FAQ

Is the zone-specific vCPU-based total quota for all instance types useful? Which should I be more concerned about: the instance type-specific quota or the zone-specific vCPU-based total quota for all instance types?

Typically, you do not need to worry about the zone-specific vCPU-based total quota for all instance types, because this value is always greater than your demand. In some cases, if your vCPU quota within a zone is insufficient, you must increase the zone-specific vCPU-based total quota for all instance types to create more instances. Capped quota in a single zone