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I am running an app/website with at max 200 visitors per day. It was running for a monthly cost around 5€. It is a python 3 flask app in standard env.

But since the 17th of june, I began to get billed around 1€ per day. Prevision for 36€ at the end of the month.

It stopped for the 20th of june. Restarted, and then stopped again the 26th and restarted again the 30th of june. All I can see is that it is front-end instance uptime cost.

I have deleted my old versions so I can't see any relevant stats.But the trafic is still the same at around 200 visitors per day, as say analytics.

I did not change anything to my app. I thought they were more users using a page that making use of Google TTS API. This pages makes request to my site, so I thought more requests were causing more uptime.

I changed back that page to use an old (deprecated) microsoft TTS API, so that users use ajax, and do not hit my site.

But I am seeing no change, and I am still billed 1€ per day. I don't know why.

Correction: My changes cut back the cost down to 0.6€ per day. But that is 6 times the previous cost. So, the question remains.

solsTiCe
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1 Answers1

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I suspect that the Google App Engine scheduling algorithms have changed though I didn't get confirmation from Google.

In any case, the system has started to interpret the existing traffic load differently and for that reason it launches additional app instances more aggressively. And additional instances beef up the bill.

Per user support suggestion, I solved the problem by defining max-instances and max-idle-instances to be 1 (in app configuration file, as described here).

Viktor Brešan
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