App Engine has a lot of faults, but your use case sounds incredibly niche. You&#x27;re using the multiregion availability of App Engine&#x27;s HTTP servers but want to use Heroku&#x27;s single AZ database across relatively flaky, slow internet instead of App Engine&#x27;s multiregion available database on a managed internal SDN. I&#x27;m having a hard time imagining a scenario where that setup would make sense.