Resource manager determines how resources are shared amongst multiple competing tasks within oracle.   Resource Management in a CDB environment has two components:  CDB level – Manage resources amongst multiple PDBs and has the ability to allocate/limit resources to specific PDB.  PDB level – Manages resources within a single PDB.   Through using the package DBMS_RESOURCE MANGER, the administrator is able to create Plans, Groups, and Allocations of resources.

Resource Allocation:

1. Create Resource Plans.
2. Create Consumer Groups.
3. Assign PDBs to Groups.
4. Each PDB is allocated a portion of the total system resources in the CDB.
5. Inside a PDB resources are allocated to individual sessions in the PDB.
6. Specify which PDBs shares of resources based on their importance.
7. Limit CPU usage of individual PDB.
8. Limit number of parallel servers a PDB can use.
9. Limit resource usage of different sessions in a single PDB.
10. Monitor resource usage of PDBs.

Larry Catt

OCP