Ahmed Jassat is an experienced Oracle APPS DBA who has reduced the time it takes to gather schema stats from 3 hours to less than 4 minutes. Previously, gathering schema stats took 3 hours and used a lot of CPU, preventing users from working during that time. By applying a patch and running gather schema with the auto option, Jassat was able to drastically reduce the time it takes to complete from 3 hours to less than 4 minutes. This improvement helps optimize the 24/7 environment by reducing downtime and high CPU usage.