db.collection.validate()

Provides a wrapper around the validate database command. Call the db.collection.validate() method on a collection object, to validate the collection itself. Specify the full option to return full statistics.

The validation operation scans all of the data structures for correctness and returns a single document that describes the relationship between the logical collection and the physical representation of that data.

The output can provide a more in depth view of how the collection uses storage. Be aware that this command is potentially resource intensive, and may impact the performance of your MongoDB instance.