I've found the following lines in our alter logs: (the oracle version is 8.1.7)

Fri Mar 14 23:39:23 2008
Restarting dead background process EMN0
EMN0 started with pid=20

immediatly followed by shutdown messages. Why was it dead and what is it
doing?

Before, I have found this errors, but I don't understand:

Fri Mar 14 10:35:13 2008
Errors in file /oracle/oracle817/rdbms/log/FWEB/udump/ora_26184_fweb.trc:
ORA-00600: internal error code, arguments: [kgskdecr1], [458752], [], [], [], [], [], []
Fri Mar 14 10:35:14 2008
Errors in file /oracle/oracle817/rdbms/log/FWEB/udump/ora_26184_fweb.trc:
ORA-00600: internal error code, arguments: [17034], [1668895408], [0], [], [], [], [], []
ORA-00600: internal error code, arguments: [kgskdecr1], [458752], [], [], [], [], [], []
Fri Mar 14 10:35:15 2008
Errors in file /oracle/oracle817/rdbms/log/FWEB/udump/ora_26184_fweb.trc:
ORA-00600: internal error code, arguments: [510], [1656928168], [library cache], [], [], [], [], []
ORA-00600: internal error code, arguments: [17034], [1668895408], [0], [], [], [], [], []
ORA-00600: internal error code, arguments: [kgskdecr1], [458752], [], [], [], [], [], []
Fri Mar 14 10:35:16 2008
Errors in file /oracle/oracle817/rdbms/log/FWEB/udump/ora_26184_fweb.trc:
ORA-00600: internal error code, arguments: [510], [1656928168], [library cache], [], [], [], [], []
ORA-00600: internal error code, arguments: [17034], [1668895408], [0], [], [], [], [], []
ORA-00600: internal error code, arguments: [kgskdecr1], [458752], [], [], [], [], [], []



the file *.trc dont tell me nothing.

thanks for your help !!!, I am very junior in this tecnology.