Hi Ahbaid, nm is used for setting the Event Name. That is what come after "trace name" keyword in the alter session set events command. nm = null stands for "context forever". so if you want to set "alter system set events '1000 trace name errorstack level 1' " for a particular session, you would use ev = 1000 le = 1 nm = 'ERRORSTACK' hth. Rakesh Tikku Managing Principal dbPerf Inc. On Jan 29, 2008 9:06 PM, Ahbaid Gaffoor <ahbaid@xxxxxxx> wrote: > Does anyone know what the "NM" parameter of DBMS_SYSTEM.SET_EV > actually gets used for? > > Typically it gets set to null when the procedure is called, but I'd like > to know if it has some usefulness that can be harnessed. > > thanks > > Ahbaid Gaffoor > -- > //www.freelists.org/webpage/oracle-l > > > -- //www.freelists.org/webpage/oracle-l