Enhance client side throttling information (#2739)

* Enhance client side throttling information

Enhance client side throttling information

* Update docs/deploy/configurations.md

Thank you.

Co-authored-by: Kishor Joshi <[email protected]>

* Update configurations.md

Co-authored-by: Kishor Joshi <[email protected]>

Author: orsenthil

docs/deploy/configurations.md

@@ -127,10 +127,20 @@ Once disabled:
 * you can no longer alter the value of an `alb.ingress.kubernetes.io/group.name` annotation on an existing Ingress.
 
 
-### Default throttle config
+###  throttle config
+
+The default throttle config used is.
+
 ```
 WAF Regional:^AssociateWebACL|DisassociateWebACL=0.5:1,WAF Regional:^GetWebACLForResource|ListResourcesForWebACL=1:1,WAFV2:^AssociateWebACL|DisassociateWebACL=0.5:1,WAFV2:^GetWebACLForResource|ListResourcesForWebACL=1:1
 ```
+Client side throttling enables gradual scaling of the api calls. Additional throttle config can be specified via the `--aws-api-throttle` flag. You can get the ServiceID from the API definition in AWS SDK. For e.g, ELBv2 it is [Elastic Load Balancing v2](https://github.com/aws/aws-sdk-go/blob/main/models/apis/elasticloadbalancingv2/2015-12-01/api-2.json#L9).
+
+Here is an example of throttle config to specify client side throttling of ELBv2 calls.
+
+```
+--aws-api-throttle=Elastic Load Balancing v2:RegisterTargets|DeregisterTargets=4:20,Elastic Load Balancing v2:.*=10:40
+```
 
 ### Instance metadata
 If running on EC2, the default values are obtained from the instance metadata service.