使用TKPROF工具进行跟踪ORACLE中程序运行状况

1.生成跟踪文件
alter session set timed_statistics=true;
alter session set events '10046 trace name context forever,level 12';
Session altered.
Session altered.

2.获得跟踪文件名

select rtrim(c.value,'/')||'/'||d.instance_name||'_ora_'||ltrim(to_char(a.spid))||'.trc'
from v$process a,v$session b,v$parameter c,v$instance d
where a.addr=b.paddr
and b.audsid=sys_context('userenv','sessionid')
and c.name='user_dump_dest';

RTRIM(C.VALUE,'/')||'/'||D.INSTANCE_NAME||'_ORA_'||LTRIM(TO_CHAR(A.SPID))||'.TRC
--------------------------------------------------------------------------------
/home/oracle/admin/ora10/udump/ora10_ora_18864.trc

3.创建TKPROF报告
tkprof /home/oracle/admin/ora10/udump/ora10_ora_16424.trc /tmp/t.txt

注意 /home/oracle/admin/ora10/udump/ora10_ora_16424.trc 这个文件只能是
ORACLE 用户才能读出

4.读报告
vi /tmp/t.txt







---运行程序

select count(*)

from

t

查询和执行统计

执行次数 CPU时间量 占用时间 磁盘IO 查询 当前 行

call调用 count cpu elapsed disk query current rows

------- ------ -------- ---------- ---------- ---------- ---------- ----------

Parse分析 1 0.00 0.00 0 0 0 0

Execute执行 1 0.00 0.00 0 0 0 0

Fetch提取 2 0.04 1.63 689 708 0 1

------- ------ -------- ---------- ---------- ---------- ---------- ----------

total合计 4 0.04 1.64 689 708 0 1

Misses in library cache during parse: 1 高速缓冲错误1

Optimizer mode: ALL_ROWS优化方式

Parsing user id: 54 分析用户ID

Rows Row Source Operation

------- ---------------------------------------------------

cr为一致方式读取，显示一致读取数(逻辑I/O) pr 是物理读取 pw为物理写入 time=(以百万分之一秒计占用时间)

1 SORT AGGREGATE (cr=708 pr=689 pw=0 time=1638784 us)

51018 TABLE ACCESS FULL T (cr=708 pr=689 pw=0 time=765387 us)

等候时间

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

db file scattered read 51 0.07 1.60

SQL*Net message from client 2 0.00 0.00

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