Dream Always Dream , if you don't work on it : Real-world Oracle DBA troubleshooting guides for RAC, Data Guard, RMAN, performance tuning, upgrades, backups, and cloud migration. Tested in production environments.
https://yum.oracle.com/oracle-linux-isos.html
If you want to know how much time a session has waited on each wait event , here are the most useful queries. 1. Current Session Wait Info...
