I was checking some performance issues in some databases and one of the issues I found was that I couldn’t get the snapshot IDs to choose the interval between “Begin” and “End” snapshot to create my report. I started to find the reason for not showing the expected output as I can list as below: Check tablespace SYSAUX usage: I had 25GB free of 75GB; So, OK. Parameter “statistics_level” was configured to TYPICAL; Thus, OK. Parameter “control_management_pack_access” was configured to “DIAGNOSTIC+TUNING”. So, OK. I checked MOS and started to do…