Notes and Constraints

Load Balancing Restrictions

The LVS and ELB load balancing modes are available for dedicated gateways. Currently, the LVS mode is supported only in LA-Mexico City1 and CN North-Beijing1. The ELB mode is supported in other regions.

Quota Limits

To change the default restrictions, increase the quota. For details about parameter configuration of a dedicated gateway, see Modifying Configuration Parameters.

It takes 5 to 10 seconds for a new or modified APIG resource to take effect.
The maximum quota may be slightly exceeded in case of high concurrency, but resource usage will not be affected.

**Table 1** Dedicated API gateway quotas
Item	Default Restriction	Modifiable
Gateways	5	√
API groups	1500	√
APIs	Number of APIs for each gateway edition: Basic: 250 Professional: 800 Enterprise: 2000 Platinum: 8000	√
APIs	1000 for each group	x
Backend policies	5	√
Apps (credentials)	50. The app quota includes the apps you have created.	√
Request throttling policies	You can create a maximum of 300 request throttling policies for each gateway. The call limit for a single user cannot exceed that for the target API. The call limit for a single app (credential) cannot exceed that for a single user. The call limit for a single IP address cannot exceed that for the target API.	√
Environments	10	√
Signature keys	200	√
Access control policies	100	√
VPC channels (load balance channels)	200	√
Variables	You can create a maximum of 50 variables for an API group in each environment.	√
Independent domain names	A maximum of five independent domain names can be bound to an API group.	√
ECSs	A maximum of 10 ECSs can be added to a VPC channel.	√
Parameters	A maximum of 50 parameters can be created for an API.	√
API publication records	A maximum of 10 publication records of an API can be retained for each environment.	√
API access rate	Up to 6000 times per second	√
Excluded applications (Credentials)	A maximum of 30 excluded apps can be added to a request throttling policy.	√
Excluded tenants	A maximum of 30 excluded tenants can be added to a request throttling policy.	√
Access to a subdomain name (debugging domain name)	A subdomain name can be accessed up to 1000 times a day.	x
Maximum size of an API request package	12 MB	√
TLS protocol	TLS 1.1 and TLS 1.2 are supported. TLS 1.2 is recommended.	√
Custom authorizers	50	x
Plug-ins	500	√
HTTP protocol	When the HTTP protocol is used, the maximum size of URL+Header is 32 KB.	x

**Table 2** Quotas of shared API gateway on the old console
Item	Default Restriction	Modifiable
API groups	50	√
APIs	200	√
Backend policies	5	√
Apps	50. The app quota includes created apps and apps generated when APIs are purchased from KooGallery.	√
Request throttling policies	You can create a maximum of 30 request throttling policies. The call limit for a single user cannot exceed that for the target API. The call limit for a single app cannot exceed that for a single user. The call limit for a single IP address cannot exceed that for the target API.	√
Environments	10	√
Signature keys	30	√
Access control policies	100	√
VPC channels	30	√
Variables	You can create a maximum of 50 variables for an API group in each environment.	√
Independent domain names	A maximum of five independent domain names can be bound to an API group.	√
ECSs	A maximum of 200 ECSs can be added to a VPC channel.	√
Parameters	A maximum of 50 parameters can be created for an API.	√
API publication records	A maximum of 10 publication records of an API can be retained for each environment.	√
API access rate	Up to 200 times per second	√
Excluded apps	A maximum of 30 excluded apps can be added to a request throttling policy.	√
Excluded tenants	A maximum of 30 excluded tenants can be added to a request throttling policy.	√
Access to a subdomain name	A subdomain name can be accessed up to 1000 times a day.	x
Maximum size of an API request package	12 MB	x
Custom authorizers	20	√

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