I’m currently setting up a MAA lab with Oracle 19c and 21c databases running on 2 node cluster with Oracle 21c Grid Infrastructure. When creating the DataGuard configuration I ran into some strange ORA-12154 error messages.
Patching the operating system of your database servers should be regular task of your system administrators. Security issues need to be fixed etc. In the context of database servers, especially database servers running oracle Grid Infrastructure, additional should be considered after patching or upgrading the operating system.
Last Friday the new version of Oracle Enterprise Manager Cloud control, Cloud Control 13c release 5, (13.5) was released. So, let’s upgrade the OEM in my lab from 13.4 to 13.5