SQL_TRACE/10046事件如何使用，详细分析

这是oracle提供用来进行SQL跟踪的强有力的工具，可跟踪解析过程，执行计划，绑定变量，递归调用等等

先执行SQL的TRACE命令，生成TRACE文件，TKPROF格式化，分析文件

alter session set sql_trace=true，启动sql_trace功能。

alter session set events '10046 trace name context forever,level 12';   开启10046事件。

其中LEVEL代表的是10046事件设置的级别，共4类：

1——启用标准的sql_trace功能，等价于sql_trace

4——level 1加上绑定值

8——level 1 等待时间跟踪

12——leve1 1+leve 4+level 8

以上可以看出10046其实就是sql_trace的增强版。

全局session的修改可用过alter system

如图，生成追踪文件

本机是在该路径下发现：E:\oracle11g\diag\rdbms\simon\simon\trace

然后tkprof 该文件

下面是格式化后的信息内容：

TKPROF: Release 11.1.0.7.0 - Production on Thu Aug 1 14:39:34 2013


Copyright (c) 1982, 2007, Oracle.  All rights reserved.


Trace file: simon_ora_9168.trc
Sort options: default


********************************************************************************
count    = number of times OCI procedure was executed
cpu      = cpu time in seconds executing 
elapsed  = elapsed time in seconds executing
disk     = number of physical reads of buffers from disk
query    = number of buffers gotten for consistent read
current  = number of buffers gotten in current mode (usually for update)
rows     = number of rows processed by the fetch or execute call
********************************************************************************


ALTER SESSION SET SQL_TRACE=TRUE




call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        0      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        0      0.00       0.00          0          0          0           0
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total        1      0.00       0.00          0          0          0           0


Misses in library cache during parse: 0
Misses in library cache during execute: 1
Optimizer mode: ALL_ROWS
Parsing user id: SYS
********************************************************************************


BEGIN DBMS_SYSTEM.SET_EV(133,6,10046,0,'SIMON'); END;




call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          0          0           1
Fetch        0      0.00       0.00          0          0          0           0
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total        2      0.00       0.00          0          0          0           1


Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: SYS
********************************************************************************


BEGIN DBMS_SYSTEM.SET_EV(133,6,10046,8,'SIMON'); END;




call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        2      0.00       0.01          0          0          0           0
Execute      2      0.00       0.00          0          0          0           2
Fetch        0      0.00       0.00          0          0          0           0
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total        4      0.00       0.01          0          0          0           2


Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: SYS


Elapsed times include waiting on following events:
  Event waited on                             Times   Max. Wait  Total Waited
  ----------------------------------------   Waited  ----------  ------------
  SQL*Net message to client                       1        0.00          0.00
********************************************************************************


SELECT SID,SERIAL#,USERNAME 
FROM
 V$SESSION WHERE USERNAME='SIMON'




call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        2      0.01       0.00          0          0          0           0
Execute      2      0.00       0.00          0          0          0           0
Fetch        4      0.00       0.00          0          0          0           4
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total        8      0.01       0.00          0          0          0           4


Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: SYS


Rows     Row Source Operation
-------  ---------------------------------------------------
      2  NESTED LOOPS  (cr=0 pr=0 pw=0 time=0 us cost=0 size=121 card=1)
      2   NESTED LOOPS  (cr=0 pr=0 pw=0 time=56 us cost=0 size=108 card=1)
      2    FIXED TABLE FULL X$KSUSE (cr=0 pr=0 pw=0 time=48 us cost=0 size=82 card=1)
      2    FIXED TABLE FIXED INDEX X$KSLWT (ind:1) (cr=0 pr=0 pw=0 time=0 us cost=0 size=26 card=1)
      2   FIXED TABLE FIXED INDEX X$KSLED (ind:2) (cr=0 pr=0 pw=0 time=0 us cost=0 size=13 card=1)




Elapsed times include waiting on following events:
  Event waited on                             Times   Max. Wait  Total Waited
  ----------------------------------------   Waited  ----------  ------------
  SQL*Net message to client                       2        0.00          0.00
  SQL*Net message from client                     2        4.22          4.22
********************************************************************************


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




call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        0      0.00       0.00          0          0          0           0
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total        2      0.00       0.00          0          0          0           0


Misses in library cache during parse: 0
Parsing user id: SYS


Elapsed times include waiting on following events:
  Event waited on                             Times   Max. Wait  Total Waited
  ----------------------------------------   Waited  ----------  ------------
  SQL*Net message to client                       1        0.00          0.00
  SQL*Net message from client                     1        2.84          2.84






********************************************************************************


OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS


call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        6      0.01       0.01          0          0          0           0
Execute      7      0.00       0.00          0          0          0           3
Fetch        4      0.00       0.00          0          0          0           4
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total       17      0.01       0.02          0          0          0           7


Misses in library cache during parse: 1
Misses in library cache during execute: 1


Elapsed times include waiting on following events:
  Event waited on                             Times   Max. Wait  Total Waited
  ----------------------------------------   Waited  ----------  ------------
  SQL*Net message to client                       4        0.00          0.00
  SQL*Net message from client                     3        4.22          7.06




OVERALL TOTALS FOR ALL RECURSIVE STATEMENTS


call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        0      0.00       0.00          0          0          0           0
Execute      0      0.00       0.00          0          0          0           0
Fetch        0      0.00       0.00          0          0          0           0
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total        0      0.00       0.00          0          0          0           0


Misses in library cache during parse: 0


    7  user  SQL statements in session.
    0  internal SQL statements in session.
    7  SQL statements in session.
********************************************************************************
Trace file: simon_ora_9168.trc
Trace file compatibility: 10.01.00
Sort options: default


       1  session in tracefile.
       7  user  SQL statements in trace file.
       0  internal SQL statements in trace file.
       7  SQL statements in trace file.
       5  unique SQL statements in trace file.
     100  lines in trace file.
   99634  elapsed seconds in trace file.