10046事件与tkprof命令

0> conn /as sysdba;

1> 激活10046

alter session set events ‘10046 trace name context forever,level 12’

oradebug event 10046 trace name context forever,level 12

2> oradebug setmypid –准备当前session使用oradebug命令

3》要执行的sql

select empno,ename,dname from scott.emp,scott.dept where

emp.deptno=dept.deptno;

4> ORADEBUG TRACEFILE_NAME –查看生成的事件文件路径

5》分析



consistent reads—cr

physical reads–pr

Cardinality–card

5.1> tkprof 命令格式化查看
1> cmd
2> 将原有的ORADEBUG TRACEFILE_NAME路径typrof

C:\Users\Administrator>tkprof c:\app\administrator\diag\rdbms\orcl\orcl\trace\orcl_ora_2788.trc e:\orcl_ora_tkprof_2788;

6》关闭10046

alter session set events ‘10046 trace name context off’

oradebug event 10046 trace name context off