Oracle 12.2 Licencing Information

https://docs.oracle.com/en/database/oracle/oracle-database/12.2/dblic/Licensing-Information.html#GUID-0F9EB85D-4610-4EDF-89C2-4916A0E7AC87

Oracle 12c SE2

Oracle Database Standard Edition 2 can be licensed on servers

supporting a maximum of two sockets on all Oracle supported

operating systems, including Windows, Linux, and Unix

Cost and Scalability Advantage:

Oracle Database Standard Edition 2 can be

licensed on servers with a maximum of 2 sockets . However, the core counts

per 2-socket server can increase over time without impacting customer license

obligation. With Oracle SE2 , customer license costs remain the same

regardless of the number of cores in the socket.