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Trace files

 
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查询oracle dump文件位置:

SQL> show parameter dump;

NAMETYPE VALUE

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

background_core_dumpstring partial

background_dump_deststring/oracle/admin/insmix/bdump

core_dump_deststring/oracle/admin/insmix/cdump

max_dump_file_sizestring UNLIMITED

shadow_core_dumpstring partial

user_dump_dest string /oracle/admin/insmix/udump

查询v$session中重要的列信息:

SQL> select sid,serial#,username from v$session;

SID SERIAL# USERNAME

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

105 40950 SYS

109 44692 TRAVEL

114 13454 TRAVEL

115 16376 TRAVEL

117 16717 TRAVEL

120 27350 TRAVEL

123 48541

133 19474 TRAVEL

141 52625 SYS

142 8549 TRAVEL

149 2

150 3

153 57669 TRAVEL

155 1

158 54 TRAVEL

160 1

161 1

162 1

163 1

164 1

SID SERIAL# USERNAME

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

165 1

166 1

167 1

168 1

169 1

170 1

发现username为空的是oracle系统的连接。

设置sql_trace参数跟踪执行的sql

SQL> alter session set sql_trace=true;

Sessionaltered

SQL> select * from dual;

DUMMY

-----

X

SQL> show parameter dump;

NAME TYPE VALUE

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

background_core_dumpstring partial

background_dump_deststring/var/oracle/oracle/admin/traveldb/bdump

core_dump_deststring/var/oracle/oracle/admin/traveldb/cdump

max_dump_file_sizestring UNLIMITED

shadow_core_dumpstring partial

user_dump_dest string /var/oracle/oracle/admin/traveldb/udump


这个文件名字中的数字对应oracle进程的pid:

Cat一下这个trace文件:

发现了刚才执行的sql。

也可以针对不同的用户产生trace文件,oracle提供了一个包:set_sql_trace_in_session:

首先确定要跟踪的用户:

executedbms_system.set_sql_trace_in_session(139,72,true);

让travel用户执行一些sql:

Cat一下这个trace文件:

发现了我们刚才执行的语句。

这个参数是控制全局的sql是不是trace 一般不用这个,而是精确控制到用户的trace。


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