You can use Oracle Database Resource Manager (Resource Manager) to allocate resources to PDBs in a CDB.
In a CDB, you can have multiple workloads within multiple PDBs competing for system and CDB resources.
In a CDB, Resource Manager can manage resources on two basic levels:
CDB level - Resource Manager can manage the workloads for multiple PDBs that are contending for system and CDB resources. You can specify how resources are allocated to PDBs, and you can limit the resource utilization of specific PDBs.
PDB level - Resource Manager can manage the workloads within each PDB.
After you have used Resource Manager to create a resource plan for a CDB, you can use EM Express to make changes to the CDB resource plan and to limit the resources to allocate to a PDB.
Note:
See Oracle Database Administrator's Guide for information on using Resource Manager with CDBs and PDBs