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¡¾Oracle¡¿SQLÓÅ»¯µÄÖØÒª¹¤¾ß AUTOTRACE

¡¾AUTOTRACE¡¿SQLÓÅ»¯µÄÖØÒª¹¤¾ß--AUTOTRACE
Ìáµ½SQLÓÅ»¯£¬²»Äܲ»ÌáAUTOTRACEµÄÇ¿´ó¹¦ÄÜ¡£Ê¹ÓÃÆðÀ´·Ç³£±ã½Ý£¬²»¹ýÔÚÊÇʹÓÃ֮ǰ£¬ÐèÒª×öһЩÅäÖõŤ×÷¡£¼òÒªµÄÃèÊöÒ»ÏÂÕâ¸ö¹ý³Ì£¬¹©Ã»ÓÐʹÓùýµÄÅóÓѲο¼¡£
1.ʹÓÃsysÓû§Ö´ÐÐplustrce½Å±¾
sys@ora10g> @?/sqlplus/admin/plustrce
sys@ora10g> drop role plustrace;
drop role plustrace
          *
ERROR at line 1:
ORA-01919: role 'PLUSTRACE' does not exist
sys@ora10g> create role plustrace;
Role created.
sys@ora10g> grant select on v_$sesstat to plustrace;
Grant succeeded.
sys@ora10g> grant select on v_$statname to plustrace;
Grant succeeded.
sys@ora10g> grant select on v_$mystat to plustrace;
Grant succeeded.
sys@ora10g> grant plustrace to dba with admin option;
Grant succeeded.
sys@ora10g> set echo off
2.½«plustraceÊÚȨ¸øpublicÓû§£¬ÒԱ㱣֤ËùÓÐÓû§¶¼ÓÐȨʹÓÃautotrace¹¦ÄÜ
sys@ora10g> grant plustrace to public;
Grant succeeded.
3.Á¬½Óµ½¾ßÌåµÄÓû§ÖУ¬ÕâÀïÊÇsecÓû§
sys@ora10g> conn sec/sec
Connected.
4.ʹÓÓset autotrace”²é¿´autotraceµÄÃüÁîÌáʾ
sec@ora10g> set autotrace
Usage: SET AUTOT[RACE] {OFF | ON | TRACE[ONLY]} [EXP[LAIN]] [STAT[ISTICS]]
5.ÕâÀïÑÝʾһÖÖÉèÖ÷½·¨
sec@ora10g> set autotrace traceonly
sec@ora10g> select * from cat;
20 rows selected.
Execution Plan
----------------------------------------------------------
Plan hash value: 3442307057
--------------------------------------------------------------------------------
| Id  | Operation             | Name   | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |        |   646 | 47804 |    33   (4)| 00:00:01 |
|*  1 |  FILTER  &nbs


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