Simple Application Server limits the queries per second (QPS) of an API operation for a single user or all users. If the number of calls to an API operation per second exceeds the limits, throttling is triggered. As a result, your business may be affected. We recommend that you take note of the limits when you call an API operation. This topic describes the QPS limits to Simple Application Server API operations.

Terms

Term Description
QPS limit for a single user QPS limit for a single user refers to the total number of calls that a single Alibaba Cloud account, and the RAM users and RAM roles within the Alibaba Cloud account can make to an API operation per second.

For example, the QPS limit for a single user for the CreateInstances API operation is 10 calls per minute. This indicates that a single Alibaba Cloud account, and the RAM users and RAM roles within the Alibaba Cloud account can make a total number of 10 calls to the API operation per minute. If the upper limit is exceeded, throttling is triggered.

QPS limit for all users QPS limit for all users refers to the total number of calls that all Alibaba Cloud accounts, and all RAM users and RAM roles within the Alibaba Cloud accounts can make to an API operation per second.

For example, the QPS limit for all users for the CreateInstances API operation is 500 calls per second. This indicates that all Alibaba Cloud accounts, and all RAM users and RAM roles within the Alibaba Cloud accounts can make a total number of 500 calls to the API operation per second. If the upper limit is exceeded, throttling is triggered.

Instances

API operation QPS limit for a single user (calls/minute) QPS limit for all users (calls/second)
CreateInstances 10 500
StartInstance 10 500
StopInstance 10 500
RebootInstance 10 500
UpdateInstanceAttribute 10 500
UpgradeInstance 10 500
ListInstances 10 500
ResetSystem 10 500
RenewInstance 10 500
ListInstancePlansModification 10 500
ListInstancesTrafficPackages 10 500

Firewalls

API operation QPS limit for a single user (calls/minute) QPS limit for all users (calls/second)
CreateFirewallRule 10 500
ListFirewallRules 10 500
DeleteFirewallRule 10 500

Snapshots

API operation QPS limit for a single user (calls/minute) QPS limit for all users (calls/second)
CreateSnapshot 10 500
ListSnapshots 10 500
DeleteSnapshot 10 500

Disks

API operation QPS limit for a single user (calls/minute) QPS limit for all users (calls/second)
ListDisks 10 500
ResetDisk 10 500

Custom images

API operation QPS limit for a single user (calls/minute) QPS limit for all users (calls/second)
CreateCustomImage 10 500
DeleteCustomImage 10 500
ModifyImageShareStatus 10 500

Other resources

API operation QPS limit for a single user (calls/minute) QPS limit for all users (calls/second)
ListRegions 10 500
ListPlans 10 500
ListImages 10 500