Re: [google-appengine] Re: high resource usage than expected

As you mentioned, your App Engine resource usage is a combination of all of your services and versions. Mainly your 'api' and 'cron-backend' services, as they have the most instance usage due to URLFetch requests and Datastore/Memcahce interactions. Your 'api' service also saw a spike in errors

[google-appengine] Re: high resource usage than expected

If you do not want to use more than the free App Engine quotas , it is recommended to set 'max_instances' = 1 for basic scaling , as you currently have two instances running