Introduction of Multitenant Architecture

As we know in Multi-tenant architecture we have only one instance at container level hence we have only one spfile for Container Database.

So value we set in parameters are associated in CDB$ROOT so applied to cdb root and serve as default parameters for all other containers;

Although we can set some pdb specific value for PDBs where ispdb_modifiable is true.

Let us understand by example.

Check some parameters from v$parameter view where ispdb_modifiable=’TRUE’

Let us change sessions parameters to a different value in pdb then cdb.

I have changed sessions value to 300 in pdb2.

I have changed sessions value to 200 in pdb1;

From cdb root, we can check pdb specific values in pdb_spfile$ view.

We can see pdb specific values here.

Stay tuned for More articles on Oracle Multitenant

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