[oracle@trade1 ~]$ sqlplus  user1/user1

SQL*Plus: Release 11.2.0.3.0 Production on Tue Aug 6 14:31:15 2013

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Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> set autot traceonly;
SP2-0618: Cannot find the Session Identifier.  Check PLUSTRACE role is enabled
SP2-0611: Error enabling STATISTICS report

确认一下库里并没有该角色，PLUSTRACE并不会在建库的时候自动创建。

SQL> select * From dba_roles where role = ‘PLUSTRACE‘ ;

no rows selected

运行脚本plustrce.sql ，创建角色。

SQL> @?/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> 
SQL> 
SQL> grant plustrace to hcpay;

Grant succeeded.

至此已经解决完

SP2-0618: Cannot find the Session Identifier.