Listing down top 10 oracle error and solution faced mostly during database administration
You may click on individual ORA- error string to find more details in for of error details , cause and possible solution to fix in your environment.
#1 ORA-01031: insufficient privileges
#2 ORA-03114: not connected to ORACLE
#3 ORA-27037: unable to obtain file status
#4 ORA-12545:Connect failed because target host or object does not exist
#5 ORA-00600: internal error code, arguments: [kqd-objerror$]
#6 ORA-02049: timeout: distributed transaction waiting for lock
#7 ORA-1652: unable to extend temp segment
#8 ORA-15063: ASM discovered an insufficient number of disks for diskgroup
#9 ORA-01078: failure in processing system parameters
#10 ORA-01157: cannot identify/lock data file - see DBWR trace file