Frontend is too expensive! urgent

[רון טופול‎]

Hi,

I dont understand frontend costs.

currently (06/05) my estimated cost for this month are 24$  which are calculated for 470.23 frontend hours.

as its seemd from instances graph that the avr.instance/sec are liitle more than 1.

however calculating 470 hours divided by the 5 day from the start of this month gives  240/24/5 = 3.9 instances/sec

this cause very high cost for the frontend.

please help me to understand this cost calculation.

[Patrice]

Hi,

You can read up here on that here : https://cloud.google.com/appengine/docs/quotas#Instances. 

I don't have access to your application, but seeing how this goes up and down very frequently, you might be hit by the fact that everytime an instance goes up, you are charged for at least 15 minutes. So all those spikes in the graph going up and down might be causing a bit more costs to you.

Also, what type of instance are you spinning up? F1, F2, etc? that can change the way instance hours are calculated.

Thank you

[רון טופול‎]

Thanks Patrice,

my app is work on F4_G1 (now changed it to F1)

what do you mean with : "type of instance are you spinning up can change the way instance hours are calculated."  

isn't it like comparing apples to oranges - "instant type" and "woking hours" - and if instant type does matter is it documented somewhere?

[Patrice]

Instance type in fact does matter, as they are theoretically more expensive. 

It's explained in our Billing FAQ actually. No matter your instance type, the actual bill is made on "F1 instance hours". So if you used F4_G1, which costs 30 cents an hour, you will in fact be billed 6 times your instance hours (since the "unit" for instance hours is in "F1 instance hours", which are worth only 5 cents, needing the 6X multiplier).

I don't know if I'm clear, feel free to ask for clarification :)