The document discusses Oracle Multitenant, which allows multiple pluggable databases (PDBs) to share a single multitenant container database (CDB). This new architecture enables better consolidation by allowing PDBs to share memory, processes and other resources at the CDB level. It also provides capabilities like cloning PDBs for provisioning, managing many databases as one through common operations, and upgrading databases in-place within the CDB.
Here’s an example of how we’d specify resource plans for the allocation of CPU between three PDBs
There are four total shares, 2 for HCM and one each for CRM and ERP.
That means that HCM is guaranteed 50% of the CPU whatever else is going on in other PDBs.
Similarly CRM and ERP are each guaranteed at least 25%.
However, there are no caps in this case, so that, for example, ERP could have 100% of the CPU if HCM and CRM were idle.