DBMS_SUPPORT包从Oracle7.2引入,主要功能用以提供更完整的用户session跟踪信息,这个包可以通过运行 dbmssupp.sql 和 prvtsupp.plb 两个脚本来创建.该脚本位于$ORACLE_HOME/rdbms/admin目录下

以下版本中都包含这些文件:

8.0.6, 8.1.7, 9.0.1, 9.2.0 and above

1.创建DBMS_SUPPORT Package

SQL> @?/rdbms/admin/dbmssupp.sql

Package created.

Package body created.

SQL> @?/rdbms/admin/prvtsupp.plb

Package body created.

2.主要函数及过程

SQL> desc dbms_support

FUNCTION MYSID RETURNS NUMBER

FUNCTION PACKAGE_VERSION RETURNS VARCHAR2

PROCEDURE START_TRACE

Argument Name                  Type                    In/Out Default?

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

WAITS                          BOOLEAN                 IN     DEFAULT

BINDS                          BOOLEAN                 IN     DEFAULT

PROCEDURE START_TRACE_IN_SESSION

Argument Name                  Type                    In/Out Default?

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

SID                            NUMBER                  IN

SERIAL                         NUMBER                  IN

WAITS                          BOOLEAN                 IN     DEFAULT

BINDS                          BOOLEAN                 IN     DEFAULT

PROCEDURE STOP_TRACE

PROCEDURE STOP_TRACE_IN_SESSION

Argument Name                  Type                    In/Out Default?

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

SID                            NUMBER                  IN

SERIAL                         NUMBER                  IN

3.简单用法

SQL> SELECT DBMS_SUPPORT.MYSID from DUAL;

MYSID

----------

8

SQL> select dbms_support.PACKAGE_VERSION from dual;

PACKAGE_VERSION

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

DBMS_SUPPORT Version 1.0 (17-Aug-1998) - Requires Oracle 7.2 - 8.0.5

4.进程跟踪(跟踪当前session及其他session)

SQL> exec dbms_support.start_trace

PL/SQL procedure successfully completed.

SQL> select count(*) from dba_users;

COUNT(*)

----------

34

SQL> exec dbms_support.stop_trace;

PL/SQL procedure successfully completed.

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

2 /

SID SERIAL# USERNAME

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

1 1

2 1

3 1

4 1

5 1

6 1

7 1

8 764 SYS

8 rows selected.

SQL> exec dbms_support.start_trace_in_session(4,1);

PL/SQL procedure successfully completed.

SQL> exec dbms_support.stop_trace_in_session(4,1);

PL/SQL procedure successfully completed.

5.Trace文件

以上跟踪生成的Trace文件可以在udump目录下找到.

SQL> show parameter user_dump

NAME TYPE VALUE

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

user_dump_dest string /opt/oracle/admin/hsjf/udump