Updating a database
By using this Directory, you have assurance that the equipment you find has the backing of AHRI and achieves the stated efficiency when properly installed and maintained.You can use PL/SQL package procedures to administer Oracle Resource Manager (Resource Manager) to allocate resources to pluggable databases (PDBs) in a multitenant container database (CDB).The following sections provide more information about shares and utilization limits. However, any PDB can use more than the guaranteed amount of a resource if there is no resource contention.Table 44-1 shows the resources allocation to the PDBs in Figure 44-1 based on the share values, assuming that loads of the PDBs consume all of the system resources allocated.Specifically, a PDB resource plan allocates resource among the consumer groups within a PDB.You can use a PDB resource plan to allocate the resources described in .When you create one or more PDB resource plans, the CDB resource plan for the PDB's CDB should meet certain requirements.
For example, you can specify that one PDB is allocated double the resources allocated to a second PDB by setting the share value for the first PDB twice as high as the share value for the second PDB. The utilization limit for a PDB limits resource allocation to the PDB.
Table 44-2 describes utilization limits for PDBs and the Resource Manager action taken when a PDB reaches a utilization limit.
When a PDB is plugged into a CDB and no directive is defined for it, the PDB uses the default directive for PDBs. You can also change the default directive attribute values for PDBs by using the package.
A utilization limit restrains the system resource usage of a specific PDB.
You can specify utilization limits for CPU and parallel execution servers.