Database/dictionary stats:

Dictionary Stats:

All thats needed:
SQL> EXEC DBMS_STATS.GATHER_SCHEMA_STATS ('SYS');
SQL> exec DBMS_STATS.GATHER_DATABASE_STATS (gather_sys=>TRUE);
SQL> EXEC DBMS_STATS.GATHER_DICTIONARY_STATS;

To gather the fixed objects stats use:-
EXEC DBMS_STATS.GATHER_FIXED_OBJECTS_STATS;