SQL> set autotrace Usage: SET AUTOT[RACE] {OFF | ON | TRACE[ONLY]} [EXP[LAIN]] [STAT[ISTICS]] SQL> set autotrace on SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabled SP2-0611: Error enabling STATISTICS report SQL> conn /as sysdba Connected. SQL> drop role plustrace; drop role plustrace * ERROR at line 1: ORA-01919: role 'PLUSTRACE' does not exist SQL> create role plustrace; Role created. SQL> grant select on v_$sesstat to plustrace; Grant succeeded. SQL> grant select on v_$statname to plustrace; Grant succeeded. SQL> grant select on v_$mystat to plustrace; Grant succeeded. SQL> grant plustrace to dba with admin option; Grant succeeded. SQL> grant plustrace to scott; Grant succeeded. SQL> conn scott/tiger Connected. SQL> set autotrace on SQL> select count(*) from emp; COUNT(*) ---------- 14 Execution Plan ---------------------------------------------------------- Plan hash value: 2937609675 ------------------------------------------------------------------- | Id | Operation | Name | Rows | Cost (%CPU)| Time | ------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 1 | 1 (0)| 00:00:01 | | 1 | SORT AGGREGATE | | 1 | | | | 2 | INDEX FULL SCAN| PK_EMP | 14 | 1 (0)| 00:00:01 | ------------------------------------------------------------------- Statistics ---------------------------------------------------------- 1 recursive calls 0 db block gets 1 consistent gets 1 physical reads 0 redo size 526 bytes sent via SQL*Net to client 520 bytes received via SQL*Net from client 2 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 1 rows processed SQL>