Hello,
after upgrade from Oracle Enterprise Manager Cloud Control 12c (12.1.0.5) to 13c I have a strange phenomena in the Database Top Activity View. A normal real-time view chart displays as always OK (Top_Activity_15sec.png). But the historical view shows a strange colors and peaks (other waits, then CPU and IO), that don't really describe a real behavior of the historical database activitiy (Top_Activity_Historical.png). As I remember it was always more green area for CPU and blue area for IO. I found an old screenshot as we had problems one year ago (Top_Activity_Old.png). A complete chart was almost the same (from CPU and IO perspective) as a real view, just over a longer period of time. Has someone saw so a strange representation of the historical data? Unfortunately I've updated all the agents to version 13 on all systems and just then found this strange chart. Agents are installed on AIX 6.1 und 7.1 and work for Database Versions 11.1.0.7, 11.2.0.4.0, 11.2.0.4.8 and 12.1.0.2. So, I think, it's database versions independent, because it affects all the databases.
Thank you!