SQL> conn scott/oracle
Connected.
SQL> set autotrace traceonly;
SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabled
SP2-0611: Error enabling STATISTICS report
SQL> conn / as sysdba 
Connected.
SQL> @$ORACLE_HOME/sqlplus/admin/plustrce.sql
SQL> 
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> 
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> 
SQL> set echo off
SQL> su - oracle
SP2-0734: unknown command beginning "su - oracl..." - rest of line ignored.
SQL> 
SQL> 
SQL> conn scott/
 
oracle
Connected.
SQL> 
SQL> 
SQL> 
SQL> set linesize 2000 pagesize 2000
SQL> 
SQL> 
SQL> set autotrace traceonly;
SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabled
SP2-0611: Error enabling STATISTICS report
SQL> 
SQL> 
SQL> conn / as sysdba
Connected.
SQL> grant PLUSTRACE to scott;

Grant succeeded.

SQL> conn scott/oracle
Connected.
SQL> set linesize 2000 pagesize 2000
SQL> set autotrace traceonly;





==========================================================================



平常都用sys，system用戶使用autotrace,今天使用其他用戶執行set autotrace 的時候報錯：
SP2-0618: Cannot find the Session Identifier.  Check PLUSTRACE role is enabled
SP2-0611: Error enabling STATISTICS report

是該用戶沒有授予PLUSTRACE這個角色的權限。
SYS AS SYSDBA@oemrep>grant PLUSTRACE to test2;
grant PLUSTRACE to test2
      *
ERROR at line 1:
ORA-01919: role ‘PLUSTRACE‘ does not exist

授權發現PLUSTRACE角色不存在，查看官方文檔後執行以下sql
SYS AS SYSDBA@oemrep>@$ORACLE_HOME/sqlplus/admin/plustrce.sql
SYS AS SYSDBA@oemrep>
SYS AS SYSDBA@oemrep>drop role plustrace;
drop role plustrace
          *
ERROR at line 1:
ORA-01919: role ‘PLUSTRACE‘ does not exist

SYS AS SYSDBA@oemrep>create role plustrace;

Role created.
SYS AS SYSDBA@oemrep>
SYS AS SYSDBA@oemrep>grant select on v_$sesstat to plustrace;

Grant succeeded.
SYS AS SYSDBA@oemrep>grant select on v_$statname to plustrace;

Grant succeeded.
SYS AS SYSDBA@oemrep>grant select on v_$mystat to plustrace;

Grant succeeded.
SYS AS SYSDBA@oemrep>grant plustrace to dba with admin option;

Grant succeeded.
SYS AS SYSDBA@oemrep>grant PLUSTRACE to test2;

Grant succeeded.

問題解決。
　　

SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabled