java - Google App Engine Backend Instance Hours are double expected -


i have written java application running on gae webapp. here extract appengine-web.xml:

<version>2</version> <threadsafe>true</threadsafe> <manual-scaling>     <instances>1</instances> </manual-scaling>

my app written listen changes firebase database, expecting run continuously. problem being billed 48 hours of 'backend instance hours' per day instead of expected 24 hours per day.

i have checked have 1 instance running. have not stopped or started (i know that adds 15 minutes). looking @ usage history, says have used 48 hours of backend instance hours in day. have no idea now. can please?

from doc: https://cloud.google.com/appengine/pricing#standard_instance_pricing

“when billed instance hours, not see instance classes in billing line items. instead, see appropriate multiple of instance hours. example, if use f4 instance 1 hour, not see "f4" listed, see billing 4 instance hours @ f1 rate.”

i recommend focus on calculating cost based on instance class using , see if bill high or accurate. accordingly, may contact billing support clear discrepancies.


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