Андрей Климов, esen,

Вот же спасибо!
Зоркие вы Соколы!

Теперь и мы знаем, что есть 21с XE!

:-)

XE бесплатна для любого использования, но имеет ограничения:

https://docs.oracle.com/en/database/oracle/oracle-database/21/xeinl/licensing-restrictions.html

4.1 Oracle Database XE CPU Limitations

Oracle Database XE limits itself automatically to two cores for processing.

For example, on a computer with 2 dual-core CPUs (four cores), if a large number of database clients try to simultaneously execute CPU-intensive queries, then Oracle Database XE will process the queries at the rate of just two cores even if more CPU capacity is available.


4.2 Oracle Database XE Installation and Execution Restrictions

Oracle Database XE restricts itself to only one installation per logical environment.

The logical environment can either be a virtual host such as a VM or container, or a physical host. If more than one Oracle Database XE installation is attempted to be started in such a logical environment, an "ORA-00442: Oracle Database Express Edition (XE) single instance violation error" is raised and the database will not start. This does not affect any existing installation or new installations of Oracle Database 21c Standard Edition 2 or Oracle Database 21c Enterprise Edition.


4.3 Oracle Database XE User Data Limitations

The maximum amount of user data in an Oracle Database XE database cannot exceed 12 GB.

If the user data grows beyond this limit, then an ORA-12592 error will appear. To use more than 12 GB of user data, upgrade to Oracle Database 21c Standard Edition 2 or Oracle Database 21c Enterprise Edition.


4.4 Oracle Database XE RAM Limitation

The maximum amount of RAM that an Oracle Database XE database uses cannot exceed 2 gigabytes, even if more is available.

Почему должны были измениться ограничения?