Troubleshoot: confused optimizer
If the Oracle optimizer chooses inefficient execution plans on queries that use MAX or MIN, it is possible that this is bug 5611962.
Troubleshoot: ora-600[kcrf_resilver_log_1] & ora-600[4193]
What to do if you encounter the ORA-600 [kcrf_resilver_log_1] or ORA-600 [4193] error in an Oracle database.
The paradoxes of time
How in AIX the use of Olson instead of Posix for the timezone can cause slowness and how to solve it.
Dynamic service registration and ora-12514
How to properly configure the database and the listener when using a port other than 1521, to avoid the ORA-12514 error.
Imminent danger, God help us!
A very serious vulnerability associated with the DBMS_JVM_EXP_PERMS package has been made public, which opens the door to unpredictable damage.