首先可以参见yang兄的blog

http://yangtingkun.itpub.net/post/468/64662

俺写了一个profile的实例

当test用户连接总时间超过120分钟 或者 test用户单次空闲时间超过2分钟，自动断开连接

sql> show parameter resource_limit

name type value
------------------------------------ ----------- ------------------
resource_limit boolean false

启用profile
sql> alter system set resource_limit = true;

系统已更改。

sql> create profile test_pro limit idle_time 2;

配置文件已创建

sql> alter user test profile test_pro;

用户已更改。

sql> alter profile test_pro limit connect_time 120;

察看test_pro设置
SQL> select * from dba_profiles where profile ='TEST_PRO';

PROFILE RESOURCE_NAME RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
TEST_PRO COMPOSITE_LIMIT KERNEL
DEFAULT

TEST_PRO SESSIONS_PER_USER KERNEL
DEFAULT

TEST_PRO CPU_PER_SESSION KERNEL
DEFAULT

PROFILE RESOURCE_NAME RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
TEST_PRO CPU_PER_CALL KERNEL
DEFAULT

TEST_PRO LOGICAL_READS_PER_SESSION KERNEL
DEFAULT

TEST_PRO LOGICAL_READS_PER_CALL KERNEL
DEFAULT

PROFILE RESOURCE_NAME RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
TEST_PRO IDLE_TIME KERNEL
2

TEST_PRO CONNECT_TIME KERNEL
120

TEST_PRO PRIVATE_SGA KERNEL
DEFAULT

PROFILE RESOURCE_NAME RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
TEST_PRO FAILED_LOGIN_ATTEMPTS PASSWORD
DEFAULT

TEST_PRO PASSWORD_LIFE_TIME PASSWORD
DEFAULT

TEST_PRO PASSWORD_REUSE_TIME PASSWORD
DEFAULT

PROFILE RESOURCE_NAME RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
TEST_PRO PASSWORD_REUSE_MAX PASSWORD
DEFAULT

TEST_PRO PASSWORD_VERIFY_FUNCTION PASSWORD
DEFAULT

TEST_PRO PASSWORD_LOCK_TIME PASSWORD
DEFAULT

PROFILE RESOURCE_NAME RESOURCE
------------------------------ -------------------------------- --------
LIMIT
----------------------------------------
TEST_PRO PASSWORD_GRACE_TIME PASSWORD
DEFAULT

16 rows selected.

验证:
sql> conn test

connected.

sql> set time on
17:38:35 sql>
17:38:36 sql>
17:38:37 sql>
17:38:37 sql>
17:42:51 sql> select count(*) from test;
select count(*) from test
*
error at line 1:
ora-02396: exceeded maximum idle time, please connect again

elapsed: 00:00:00.00
17:42:58 sql>

删除用户profile
sql> drop profile test_pro cascade; --删除test_pro及联用户使用此profile

profile dropped.

通过profile可以起到约束session的行为.简单易用,比通过应用程序设置session连接属性简单易行.

Oracle 提供了一些具体约束session行为的Resource_name可以同过查询

http://www.psoug.org/reference/profiles.html
获得.