1- I assume the 60-second value was just some random number. This is because the deadline for requests to frontend instances is 60 seconds. Otherwise, you will be hit by DeadlineExceededErrors <https://cloud.google.com/appengine/articles/deadlineexceedederrors>.
2- Concurrent, by definition, means an event can exist/happen or be done at the same time. This means it does not have to wait for a single task to finish before executing the next one. GAE Flex environment automatically scales your app and down <https://cloud.google.com/appengine/docs/flexible/> while balancing the load. Here also is an article <https://cloud.google.com/appengine/docs/flexible/python/how-instances-are-managed#instance_scaling_1> explaining the instance behavior depending if the application is set to manual or automatic scaling. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/7e59ef15-c231-4b7f-bd9a-9fbf897b495d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
