I like presenting at face-to-face events and I was really happy that the DOAG conference took place as an in-person conference this year. On the other hand, all these virtual events around the globe allow you to attend (and to speak at) lots of events worldwide.
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.