The implementation of bulkWrite metrics should be equivalent to a single bulkWrite operation. That is, successive insert ops (on the same namespace) in the bulkWrite are grouped into one call of "opCounters.inserts" and every update/delete op (regardless if its on the same namespace or not) increments its own metric. For example, a single update command with 5 update ops will increment this metric 5 times.

Ensure the updateMany and deleteMany cases also follow this pattern. Please refer to this slack conversation for more context.