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Elastic Compute Service

Instances

Managing instance resource quota

To prevent resource abuse, the platform sets resource quotas for ECS instances under each account by availability zone and billing method. For example, the maximum number of vCPUs or Elastic IPs (EIPs) you can use. This topic describes how to manage ECS resource quotas.

Evaluating resource quota

Instance creation may fail if available quotas for resources such as vCPUs, volumes, or Elastic IPs (EIPs) are insufficient. Therefore, we recommend that you evaluate the available quotas of resources before creating an instance. Make sure that, under your account, the sum of existing resources and resources to be created does not exceed the corresponding quotas, so that instance creation does not fail due to quota limits. The specific limits are as follows:

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Only the main quota limits involved in creating instances are described here. For other quota limits on ECS-related resources and resources for which the quotas can be changed, please refer to Constraints.

Limit item	Limit description	View/Change quota
vCPU	Maximum vCPUs or GPUs available for an instance type family configured with a specified billing method within an availability zone	For specific steps, please refer to Viewing or changing quota.
Volume	The maximum capacity of a volume used in a region.
EIP	The number of EIPs that can be applied for within a region.

Viewing or changing quota

If the default quota of an ECS-related resource can not meet your business needs, and the resource allows quota change, you can view and change the quota in the following ways.

ECS instance quota

EIP quota

Volume quota

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You can view instance quotas by region, availability zone, and billing type. For the specific quota items and applicable instance type families, please refer to Quota items based on ECS instance type.

Log on to the Quota Center console.

On the "Product list" page, set the product category to "Compute" and click the "ecs" card.

Click on the product card. On the quota list page that appears, you can view or apply for a quota.

View quota: You can view the quota for each instance type family under the current account and the vCPU quota for all instance type families and current usage based on three dimensions: billing type, region, and availability zone.

As shown in the following picture, 200 cores of vCPU are allocated for pay-as-you-go instances in this availability zone by default. Currently, 192 cores are in use, and you can configure a maximum of 8 more cores. If you create an instance with more than 8 vCPU cores, the creation will fail due to insufficient vCPU quota.

Apply for a higher quota : In the "Actions" column, click the "Apply" button. Follow the prompts to complete quota application.

Quota items based on ECS instance type

As shown in the following table, the quota center provides quota items based on ECS instance type and the applicable instance type families.

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When applying for quota increase, you need to find the quota corresponding to the instance type/instance type family to be enhanced based on the following table. Select the corresponding quota item for enhancement. In addition, note whether the vCPU quota for all instance type families is sufficient. If not, an application is required. After the upgrade is completed and the application for increasing quota for a specific type family is approved, the vCPU quota for all instance type families will be automatically changed. No further application is required.

After the upgrade is completed, the vCPU quota for all instance type families ≥ Quota of regular vCPUs + Quota of local volume vCPUs + Number of vCPUs corresponding to quota of basic GPUs + Number of vCPUs corresponding to quota of high-performance GPUs.

Quota item	vCPU quota for all instance type families (formerly vCPU quota)	Quota of regular vCPUs	Quota of local volume vCPUs	Quota of basic GPUs	Quota of high-performance GPUs
Quota code	vcpu	general_vcpu	local_volume_vcpu	gpu_basic	gpu_high_performance
Scope of the instance type families	All types	General-purpose Compute-optimized Memory-optimized High Frequency Network Enhanced Burstable instance Shared General-purpose EBM Compute-optimized EBM Memory-optimized EBM High Frequency EBM Security Enhanced EBM (Beta) Discontinued instance type families (excluding Local SSD i1)	Local SSD Big Data Local SSD EBM Discontinued Local SSD i1	GPU Accelerated GPU Rendering Instance types to be discontinued (excluding hpcg1v)	High Performance Computing Optimized hpcg1v, which is about to be discontinued