One approach to get to know a MongoDB system we are not familiar with is to start by checking the busiest collections. MongoDB provides the top administrative command for this purpose. From the mongo shell, we can run db.adminCommand(top) to get a snapshot of all the collections at a specific point in time: [crayon-6210befa18781201127048/] In [&]

https://www.percona.com/blog/monitoring-mongodb-collection-stats-with-percona-monitoring-and-management/