upgrade from Oracle Database 18c to 19c

Hello,

We are planning to upgrade oracle from 18. to oracle 19.

Database size now is more than 10TB, since downtime is quite critical for us,

therefore export and import is not possible, do you have any suggestions how we can achieve this and reduce downtime to minimum?

Requirements are:

1. same hardware(Linux Redhat7)

2. DB: Oracle upgrade from 18.9.0.0 to 19 (maybe 19.8)

3. Downtime minimum

thanks a lot.

Best regards,

Hosyu