DBA Catalog

Backup job failed because RMAN cannot make a snapshot control file. The message stack is as follows: RMAN-00571: ==========================...

When developer is trying to recompile PL/SQL package, session hangs until get this error: ORA-04021: timeout occurred while waiting to lock...

Oracle Enterprise manager shows errors: A lot of failed login attempts in the last 30 minutes Checking: select USERNAME, ACT...