Can you simply switch from SE2 to EE with Oracle Multitenant

This question is coming up from time to time – and currently not covered in the official Oracle documentation as far as I know: “Can you simply switch from SE2 to EE with Oracle Multitenant?” Yes, you can! First of all, the switch is possible and tested. But you’ll have to satisfy a few requirements: Both database versions must be the same Both databases must have the same character set (in Oracle Database 12.1) That’s it. Simply unplug your Standard Edition 2 PDB and plug it into your Enterprise Edition CDB. In addition you may have to run several component…

Why does the upgrade of PDB$SEED always take longer?

Upgrading the PDB$SEED takes always longer than any other container. What is the reason for an upgrade of the PDB$SEED taking so much longer in a real world environment? How does an upgrade with Oracle Multitenant work? I have written several blog posts in the past about the different techniques to upgrade an Oracle Multitenant environment: Upgrade Everything At Once Upgrade via Unplug/Plug/Upgrade The interesting case happens in the “Everything At Once“. The PDB$SEED takes significantly longer to upgrade than any other container. Upgrading the PDB$SEED takes always longer? Quick recap: The PDB$SEED is the (I call it) blueprint PDB…