sql monitoring not capturing all sql
Hello all, I am on 11.2.0.1 and using Grid control to monitor activity on my DB. There are quite a few DB session active....one session has over 80K logical reads and about 800+ cpu seconds....and its been goin for about couple of mins...running sql query from command prompt....and it shows up in TOP ACTIVTY in grid control as well...but when i go in SQL Monitoring ...there are no sql query that is active...it says "NO SQL EXECUTION WERE MONITORED SO FAR".... if i click on the drop down list and says show me sql for last 6 hrs or 12 hours it pops up...but if i do last 10 mins...nothing shows up....but as i mentioned session are active on the server for a while...so why is it not being captured by sql monitoring ?