Locations of tnsnames.ora

During a recent troubleshooting, we came across a requirement where we wanted to know what all locations does Oracle searches tnsnames.ora ? So writing this quick post for the analysis that we did and the results we reached during this exercise. You might already aware of tnsnames.ora in path defined by TNS_ADMIN variable and default…

Oracle Listener Tracing & network troubleshooting

This article focuses on the Oracle Listener Tracing & Troubleshooting, in this article we would explore the parameters available to enable tracing on Oracle listener so that additional data is available to troubleshoot network related issues between client & server. To enable Listener tracing add following parameters to listener.ora:- TRACE_LEVEL_LISTENER=[0-16|USER|ADMIN|SUPPORT|OFF]#This parameter defines the level of…

Dead Connection Detection

Dead connection detection (DCD) is a Oracle net feature which is primarily intended for environments where clients power down their systems or client machine crashes unexpectedly without gracefully closing the connections from the Oracle database. In cases where client machine abruptly crashes with properly disconnection the sessions from Oracle databases the resources locked by such…