Currently, MongoDB does not have an internal resource manager that can facilitate management of resources across databases/users. Several DBMS products have an internal "resource manager" that allows one to assign resources (IO, memory, compute, runtime limits, etc.) to specific database and/or users. Some of them have a concept of "resource pools" with different compute resources (CPU/Mem etc.) per pool, which could be assigned to specific user-accounts/databases. This allows for isolating different workloads, such that resource utilization for one workload (queries) on one database has a minimal-to-none performance impact on other workloads (queries) running against other databases.