App Engine Pricing for auto scaling instances

[Nilson Pontello]

Hi Everyone,

From this link I found the below:

Instances running in manual and basic scaling services are billed at hourly rates based on uptime. Billing begins when an instance starts and ends fifteen minutes after a manual instance shuts down or fifteen minutes after a basic instance has finished processing its last request. Runtime overhead is counted against the instance memory limit. This will be higher for Java than for other languages.

It is not clear for me at all and I would like to ask you two questions:

1. What does google mean about "Runtime overhead is counted against the instance memory limit"?
   
2. What about how auto scaling instances are billed? 

Until reaching this article my understanding was:

1. manual and basic billing begins when an instance starts and ends fifteen minutes after instance shuts down
   
2. auto starts when a request arrives and finishes fifteen minutes after finished processing its last request

And now I am very confused.

Thanks

[Nilson Pontello]

Hi,

 After researching a bit more I've found this other link and it says.

Billing is slightly different in resident and dynamic instances:

1. For resident instances, billing ends fifteen minutes after the instance is shut down.
2. For dynamic instances, billing ends fifteen minutes after the last request has finished processing.

I believe the first link contains wrong info is is leading to the confusion.

Regards

[Kenworth (Google Cloud Platform)]

It is not clear for me at all and I would like to ask you two questions:

1. What does google mean about "Runtime overhead is counted against the instance memory limit"?
   

Runtime overhead is the resource needed to serve an instance.

 

1. What about how auto scaling instances are billed? 

 As you noted, auto scaling billing starts when an instance starts and ends fifteen minutes after the last request has finished processing.