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. -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Thomas Jeff Sent: Wednesday, February 02, 2005 6:27 PM To: oracle-l@xxxxxxxxxxxxx Subject: 9.2.0.4 listener problems We are having a mysterious listener issue that suddenly cropped up at roughly 4:00am today on our AIX 5.2.0.4, Oracle 9.2.0.4 test box. Everything hangs, sql*plus, tnsping, etc. We've checked it all, config files, hardware, network, etc, and cannot find a culprit. The box has been bounced to no avail. It can take anywhere from 30 seconds (if you are lucky) to minutes=20 to infinity to get connected. If we trace, the trace shows it hanging at this point: [02-FEB-2005 18:11:11:665] nsnainit: inf->nsinfflg[0]: 0x41 inf->nsinfflg[1]: 0x41 [02-FEB-2005 18:11:11:665] nsopen: global context check-in (to slot 0) complete [02-FEB-2005 18:11:11:665] nscon: doing connect handshake... [02-FEB-2005 18:11:11:665] nscon: sending NSPTCN packet =20 The weird thing is that every now and then, it clears up momentarily, and you can=20 connect and work for a very short window of time, perhaps 1 or 2 minutes, then the=20 hang/slowdowns resume. This has our whole SA/DBA team flummoxed. Oracle Support has been scratching their heads on this. -------------------------------------------- Jeffery D Thomas DBA Thomson Information Services Thomson, Inc. Email: jeff.thomas@xxxxxxxxxxx Indy DBA Master Documentation available at: http://gkmqp.tce.com/tis_dba -------------------------------------------- -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l