Hello Google App Engine Team,

I am currently trying to understand the future consequences of the new pricing 
model. One of our typical request types has an average latency of 0.75 seconds 
(waiting for an URL Fetch most of the time) and needs around 0.10 seconds CPU. 

- With the current pricing, CPU costs (dynamic instance costs) are $2.78 per 
million requests:
  10^6 * 0.10 CPU seconds/request / 3600 seconds/hour * 0.10 $/CPU hour
- With the new model, dynamic instance costs seem to be $16.67 per million 
requests (without any idle time):
  10^6 * 0.75 instance seconds/request / 3600 seconds/hour * 0.08$/instance hour

That's an 6x increase without even considering idle time for the instances.
If the scheduler can make the instances answer requests 60% of the time, that 
would mean a 10x increase.
The current scheduler seems to be around 15-20%, which would mean a 30x-40x 
increase.

Do these numbers sound about right? If not, could you please explain which of 
the assumptions I made are wrong?


I hope you all have a great time at Google I/O!

Tammo Freese

--------------------------------
Tammo Freese

FlockOfBirds UG (haftungsbeschränkt) 
Marie-Curie-Straße 1, 26129 Oldenburg, Germany

Amtsgericht Hamburg, HRB 114558
Sitz Hamburg
Geschäftsführer: Tammo Freese

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