Just to add some questions: if the messages below represent "normal" application
connection requests that use already established connection pool physicalconnections, why the port, assigned by the listener, changes with every request? I mean, why this is happening more than once for a single physical connection? I don't seem to find an explanation/documentation on how exactly the Oracle listener
handles jdbc connection pool requests. Regards Dimitre -------- Original Message -------- Subject: jdbc - connection pool and connect frequency Date: Thu, 02 Dec 2010 17:58:42 +0100 From: Radoulov, Dimitre <cichomitiko@xxxxxxxxx> To: oracle-l@xxxxxxxxxxxxx Hi all, I'm trying to understand what exactly the following entries represent (notice the frequency) ? We have more than one application that use connection pooling through jdbc and listener logs that contain many entries like the these: 02-DEC-2010 17:34:18 * (CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) * (ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=34505)) * establish * <my_host> * 0 02-DEC-2010 17:34:18 * (CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) * (ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=34504)) * establish * <my_host> * 0 02-DEC-2010 17:34:18 * (CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) * (ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=34506)) * establish * <my_host> * 0 02-DEC-2010 17:42:03 * (CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) * (ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=44922)) * establish * <my_host> * 0 02-DEC-2010 17:44:07 * (CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) * (ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=45124)) * establish * <my_host> * 0 02-DEC-2010 17:44:10 * (CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) * (ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=45143)) * establish * <my_host> * 0 02-DEC-2010 17:44:10 * (CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) * (ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=45144)) * establish * <my_host> * 0 02-DEC-2010 17:44:10 * (CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) * (ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=45145)) * establish * <my_host> * 0 I suppose these are connect requests that use already established connections from the connection pool and not new connections given v$session.logon_time does not reflect the timestamp reported in the listener log file, am I right? Does anybody know how these requests are/could be controlled? Regards Dimitre