SQL> alter system flush shared_pool;
SQL>
SQL> alter session set optimizer_index_cost_adj=100;
SQL>
SQL> alter session set optimizer_index_caching=0;
SQL>
SQL> begin
2 dbms_stats.import_system_stats( stattab => 'SYSTEM_STATS', statid => 'OLTP', statown => user );
3 end;
4 /