[oracle@trade1 ~]$ sqlplus user1/user1
SQL*Plus: Release 11.2.0.3.0 Production on Tue Aug 6 14:31:15 2013
Copyright (c) 1982, 2011, Oracle. All rights reserved.
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.
原文：http://www.cnblogs.com/yiyuf/p/4103904.html