Quota Center lets you check your Elastic Compute Service (ECS) quota limits and usage, request quota increases, and set up quota alerts. Each quota defines the maximum number of a specific cloud resource or operation available in your Alibaba Cloud account. The system dynamically adjusts quotas based on your actual usage -- request an increase only when you anticipate a significant surge in demand.
ECS quota types
ECS quotas fall into two categories: general quotas that limit resource counts, and API rate limits that control how frequently you can call OpenAPI operations.
General quotas
General quotas limit the cloud resources in your account, such as the maximum number of security groups. Three subcategories apply to ECS:
| Quota subcategory | What it limits | Scope |
|---|---|---|
| Ecs Quotas by Instance Type | Maximum number of vCPUs for an ECS instance type, cards for a GPU-accelerated instance, or vGPU-accelerated instances | Per account, per region, per billing method |
| Elastic Compute Service | Resources such as images and security groups | Per account, per region |
| Elastic Block Storage (EBS) | Different types of cloud disks | Per account, per region and zone |
API rate limits
API rate limits control the frequency of OpenAPI calls. For example, the RunInstances operation has a rate limit of 100/60(s).
| Quota subcategory | API version | What it covers | Increase requests |
|---|---|---|---|
| Elastic Compute Service | 2014-05-26 | Operations related to images, security groups, and block storage | Not supported |
| Elastic Block Storage | 2021-07-30 | Advanced block storage features | Supported |
ECS API rate limits (API version 2014-05-26) cannot be increased. EBS API rate limits (API version 2021-07-30) can be increased.
View and increase general quotas
The steps for viewing and requesting a quota increase are the same for all three general quota subcategories. The only differences are the console entry point and the available filters.
Step 1: Open the quota page
Open the Quota Center page for the quota subcategory you want to manage:
| Quota subcategory | Console link |
|---|---|
| Ecs Quotas by Instance Type | General Quotas of Ecs Quotas by Instance Type |
| Elastic Compute Service | General Quotas of Elastic Compute Service |
| Elastic Block Storage | General Quotas of Elastic Block Storage |
Step 2: Select the region
Select the region you want to view. For EBS quotas, also select a zone.
Step 3: Find the quota
How you locate a specific quota depends on the subcategory:
Ecs Quotas by Instance Type: Filter by the instance type you want to view. For the mapping between quota items and instance types, see vCPU quota items and GPU and vGPU quota items.
Elastic Compute Service and Elastic Block Storage: Search by quota ID, name, or description.
Step 4: View quota usage
In the quota list, the Total Quotas column shows the upper limit and the In Use column shows current usage.
Step 5: Request a quota increase
In the Actions column, click Apply.
ImportantIf Unadjustable is displayed in the Actions column, the quota cannot be increased.
In the dialog box, set Applied Quotas and Reason. Keep the default value for Notify Result.
NoteSpecify a reasonable quota value and provide a detailed reason to improve approval chances.
Click OK.
In the left-side navigation pane, click Application Records to view the approval status. A status of Approved indicates a successful increase. You also receive the result by SMS and email.
View and increase API rate limits
View ECS API rate limits
ECS API rate limits apply to API version 2014-05-26 for operations related to images, security groups, and block storage. These rate limits are view-only and cannot be increased.
Go to the API Rate Limits of Elastic Compute Service page.
Select the region you want to view.
In the quota list, find a quota item by its API Name. The Total Quotas column shows the upper rate limit for the corresponding API operation.
View or increase EBS API rate limits
EBS API rate limits apply to API version 2021-07-30 for advanced block storage features.
Go to the API Rate Limits of Elastic Block Storage page.
Select the region you want to view.
In the quota list, find a quota item by its API Name. The Total Quotas column shows the upper rate limit.
To request a rate limit increase:
In the Actions column, click Apply.
ImportantIf Unadjustable is displayed in the Actions column, the rate limit cannot be increased.
In the dialog box, set Applied Quotas and Reason. Keep the default value for Notify Result.
NoteSpecify a reasonable quota value and provide a detailed reason to improve approval chances.
Click OK.
In the left-side navigation pane, click Application Records to view the approval status. A status of Approved indicates a successful increase. You also receive the result by SMS and email.
References
DescribeAccountAttributes: Query resource creation quotas in a region, including security groups, Elastic Network Interfaces (ENIs), vCPUs for pay-as-you-go and spot instances, pay-as-you-go cloud disk capacity, dedicated hosts, network types, and real-name verification status.
Quota alerts: Create an alert for a quota item to receive a notification when usage reaches a preset threshold. This lets you request a quota increase before hitting the limit.
Query applications and view application details: Track the approval status of quota increase requests.
Quota Center documentation: Learn about additional quota management operations.