The first-response checklist is probably the most useful part here. I like the emphasis on identifying the actual symptom before immediately generating an AWR report or running an advisor. Checking the alert log and active sessions first can quickly rule out things like blocking or an obvious database error.

The point about wait events is important too. Looking at whether the system is spending time on I/O, CPU, locks, or redo gives you a much better direction than simply assuming the database needs more memory or configuration changes. This kind of practical troubleshooting is also useful when working through databases assignment help because it shows how the concepts apply to real Oracle environments rather than just theory.

The redo prioritization feature in 26ai is also interesting for mixed OLTP and batch workloads.