We installed the 12C OEM. But the "top activities" and other options are not enabled from performance pane. I tried to set the parameter control_management_pack_access = "DIAGNOSTIC+TUNING" . Does not work. As was told that should be due to the databases we are running is 220.127.116.11 standard edition. We have the license for the tuning package. Does anybody knows how to enable the option on standard edition database?