Curious. Have you tried setting the listener to listen on another port ? Setup the listener.ora to use another port [say 1523 or 1621] other than the default 1521. {of course, you'd have to update the tnsnames.ora on the clients as well -- or you could test this with two seperate listeners on the two seperate ports} Hemant At 09:20 PM Thursday, Thomas Jeff wrote: >To add to this. We shut down the 9i listener and fired up a 10g >listener. The same >problems persist. What happens is that it's fine for about 5 minutes >(with the 10g >listener) then the tnsping times drop off the table, and the slowdowns >resume. It >looks like some sort of load/resource contention issue. > Hemant K Chitale http://web.singnet.com.sg/~hkchital -- //www.freelists.org/webpage/oracle-l