用10046 跟踪exp

之前写过一个blog，Oracle expdp为什么比exp快，原理是什么，是从官方文档中获知的，如今通过10046来分析exp的过程。

C:\Users\Administrator>exp LCAMTEST/LCAMTEST@10.10.15.25_LCAM file=d:/test.dmp tables=(BPMS_RU_ACTIVE_INS)

SQL> SELECT p.spid,p.addr,p.pid,s.sid,SUBSTR(s.username,1,15) "USERNAME",

    SUBSTR(s.program,1,15) "PROGRAM"

    FROM v$process p,v$session s

    WHERE s.paddr=p.addr

    AND addr=(SELECT paddr FROM v$session WHERE UPPER(program) LIKE 'EXP%');

SPID    ADDR               PID   SID USERNAME    PROGRAM

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

15067    000000018C4FFD10    24    10 LCAMTEST    exp.exe





要以sys登录。否则oradebug setospid 15067会报ORA-01031: 权限不足。

SQL> oradebug setospid 15067

Oracle pid: 18, Unix process pid: 15067, image: oracle@oracle (S000)

SQL> oradebug unlimit

已处理的语句

SQL> oradebug Event 10046 trace name context forever, level 12

已处理的语句



D:\>tkprof lcamtest_s000_15067.trc  15067.txt

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

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

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





SQL ID: 9c4gmqy4k7a7q

Plan Hash: 3521625488

SELECT /*+NESTED_TABLE_GET_REFS+*/ "LCAMTEST"."BPMS_RU_ACTIVE_INS".* 

FROM

 "LCAMTEST"."BPMS_RU_ACTIVE_INS" 



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   460025     18.25      13.83      31870     485572          0     2300122

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

total   460025     18.25      13.83      31870     485572          0     2300122



Misses in library cache during parse: 0

Parsing user id: 87  





Elapsed times include waiting on following events:

  Event waited on                             Times   Max. Wait  Total Waited

  ----------------------------------------   Waited  ----------  ------------

  virtual circuit wait                       919983        0.25        309.81

  SQL*Net message from client                460026        0.01         36.02

  SQL*Net message to client                  460025        0.00          0.67

  db file scattered read                        250        0.07          1.68

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