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 |