DB12c: Multi-tenant(PDB) Resource Manager calculation

I think the 'share' calculation in DB12c Multitenant architecture's resource management looks new to many
seasoned Oracle DBAs.

Using Oracle Resource Manager for PDBs

shows that the total number of shares is seven (3+3+1). The salespdb and the servicespdb PDB are each guaranteed 3/7th of the resources

But it really is not.

CPU Share Definition - Oracle Solaris Administration: Oracle Solaris Zones, Oracle Solaris 10 Zones, and Resource Management

Shares are used
to define the relative importance of workloads in relation to other workloads.


This way of specifying resource has been used since at least Solaris 10.

I think there are other vendors' products which use this method.

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