Saurabh, IIRC the first one (_smu-debug-mode) disables the tx recovery and the event just downgrades the process to serial. -Gopal On Tue, Aug 16, 2011 at 5:48 AM, Saurabh Sood <email2sood@xxxxxxxxx> wrote: > > Can someone point out the difference between these two things which are > solving the same purpose? > Thanks, > -- > SAURABH SOOD > ORA-DBA > www.askdba.org -- //www.freelists.org/webpage/oracle-l