Massive resource usage why?

Is the Ram usage cumulative instead of current usage? Because it's running a service that on Heroku used at most 120MB memory and very little CPU on any service, and Mongo Atlas happily managed on less than 2GB memory. Yet these logs suggest something is seriously wrong? ProjectID: 8b3cd54a-ea7e-425b-8b7b-ed6be9d456e7