ORA-12541 TNS no listener

ORA-12541 : TNS no listener error is generated by oracle network layer. This error occurs when the listener for the oracle server you are trying to reach is down or unreachable. ORA-12541

ITIL V3

A number of you dba's out there use ITIL in day to day life and are looking to upgrade from V2 to V3 in your organizations. Here is a quick reference that provides ITIL V3 introduction and the various areas that it addresses.

ITIL V3

ORA-03113

An ORA-03113 end-of-file on communication channel error is a very generic error that indicates that the connection has been lost. ORA-03113 is reported by the oracle client processes due to many reasons. ORA-03113 by itself does not indicate the cause of the issue and is accompanied by other messages that are either displayed on the client side or in the oracle database alertlog.

ORA-03113

ORA-12154 TNS Could not resolve service name

This is a collection of documents that refer to a solution related to this error. Looks like most of my end users are constantly googling for this..

ORA-12154