What a strange topic. And I thought I never will blog about this. But as I have received the same question for the third time today, I think there’s a bit clarification needed. Lost AWR snapshots reappear in Oracle 12.2 in Multitenant pluggable databases.
Lost AWR snapshots reappear again in Oracle 12.2 in Multitenant
In a non-CDB database you have your local AWR data stored in the SYSAUX tablespace.… [Read More]
At the moment I work with one of our reference customers, Swiss Mobiliar Insurance, on their Multitenant upgrade to Oracle Database 18.104.22.168. And we encountered an “interesting” issue. After upgrade we received an ORA-44787 making it impossible to switch between containers with “alter session set container=pdb1;” commands.… [Read More]
The script noncdb_to_pdb.sql gets run only once in the life span of your database. It gets executed when a regular Oracle database (non-CDB) gets move to become part of a Single-/Multitenant deployment as a pluggable database (PDB). But why does it take so long?
You will never run this script again for this database.… [Read More]
Theory is nice but it’s a big difference when you do it the first time with a non-lab deployment at a customer with a real Multitenant database with almost 100 PDBs.Then you learn that neither the documentation nor my previous blog post contain all the necessary steps.… [Read More]