Weekend Learning: Master reference note for "CPU time" wait events

If you have ever looked at what your database is doing in either a real time fashion, or via ASH/ADDM reports, then you have obviously seen wait events referencing the CPU and that does not mean there is a problem with the CPU or even with the database, but for the times when you are not sure make sure you have favorited the document ""DB CPU" / "CPU + Wait for CPU" / "CPU time" Reference Note" in My Oracle Support note 1965757.1 so you have a one-stop shop at your fingertips!  This would also be useful too, if you wanted to utilize it to check out possible issues when upgrading your database version or adding new features!