Hi, is there any chance You can use and share with us output from Tanel's ------------------------------------------------------------------------------------ -- -- File name: oStackProf.sql ( Oradebug short_Stack Profiler ) -- Purpose: Take target process stack samples and show an execution profile -- -- Author: Tanel Poder -- Copyright: (c) http://www.tanelpoder.com -- from http://files.e2sn.com/scripts/tpt_public_unixmac.tar.gz during slowness, we can see whats going on on calls level maybe that will help . Btw is there any chance You can switch to securefiles LOBS ? And can You show awr report from that period, maybe there is some HWM enqueue issue ? Disclaimer: Dont blame me for any production issues related to my advice :) Regards GregG ---------------------------------------------------------------- Konkurs: Wygraj nowoczesna suszarke do wlosow! Sprawdz >>> http://linkint.pl/f2a72 -- //www.freelists.org/webpage/oracle-l