Hello Fairlie, I am looking for more internal insight on how to interpret information that are in the trace files generated by events. Thanks, Ron fairlie rego <fairlie_r@xxxxxxxxx> wrote: Hi Ron, If you do an oerr ora before the event number on a Unix box u will get a brief description of what the event does (as seen below) The levels determine the amount of tracing that is to be done. I would presume you are having a performance problem with a logical standby database. I would also hope that you are not on 9i Regards, Fairlie elephant-> oerr ora 16300 16300, 00000, "LSBY architected tracing event" // *Cause: // *Action: elephant-> oerr ora 1349 01349, 00000, "LogMiner tracing event" // *Cause: // *Action: elephant-> oerr ora 10308 10308, 00000, "replication testing event" // *Document: NO // *Cause: // *Action: elephant-> oerr ora 26700 26700, 00000, "STREAMS tracing event" // *Document: NO // *Cause: // *Action: Ron Warshawsky <ronwarshawsky@xxxxxxxxx> wrote: Dear List, Can you share insight on below dataguard related events: event="16300 trace name context forever, level 63"; event="16300 trace name context forever, level 15"; event="1349 trace name context forever, level 4095"; event="26700 trace name context forever, level 1560"; event="10308 trace name context forever, level 8"; Regards, Ron Warshawsky Fairlie Rego Senior Oracle Consultant http://www.linkedin.com/in/fairlierego http://el-caro.blogspot.com/ M: +61 402 792 405 --------------------------------- Want to be your own boss? Learn how on Yahoo! Small Business.