Contention on SYS.DUAL table (11204)

Too much Contention on SYS.DUAL table and on an average the number of executions on SYS.DUAL is around 70 – 100 million times during our ETL daily jobs running time

Current Database version : 11.2.0.4

Please suggest that the below workaround can be reduced the contention on sys.dual table

create table my_dual (x number primary key) organization index;

thank you in advance

Regards

N Jandial