Home Database Mysql Tutorial Oracle profile 用户资源限制 说明

Oracle profile 用户资源限制 说明

Jun 07, 2016 pm 04:59 PM

Oracle系统中的profile可以用来对用户所能使用的数据库资源进行限制,使用Create Profile命令创建一个Profile,用它来实现对数据

一. 说明 

Oracle recommends that you use the Database Resource Manager rather than this SQL statement to establish resource limits. The Database Resource Manager offers a more flexible means of managing and tracking resource use. For more information on the Database Resource Manager, refer to Oracle Database Administrator's Guide. 

Purpose

Use the CREATE PROFILE statement to create a profile, which is a set of limits on database resources. If you assign the profile to a user, then that user cannot exceed these limits.

Oracle系统中的profile可以用来对用户所能使用的数据库资源进行限制,使用Create Profile命令创建一个Profile,用它来实现对数据库资源的限制使用,如果把该profile分配给用户,,则该用户所能使用的数据库资源都在该profile的限制之内。

Prerequisites

To create a profile, you must have the CREATE PROFILE system privilege.

To specify resource limits for a user, you must:

(1).      Enable resource limits dynamically with the ALTER SYSTEM statement or with the initialization parameter RESOURCE_LIMIT. This parameter does not apply to password resources. Password resources are always enabled.

(2).      Create a profile that defines the limits using the CREATE PROFILE statement

(3).      Assign the profile to the user using the CREATE USER or ALTER USER statement

其他一些参数的说明,参考上面贴的连接里的官网信息。

二.  PROFILE 管理

       Proflie是口令限制,资源限制的命名集合.建立oracle数据库时,oracle会自动建立名为DEFAULT的PROFILE,初始化的DEFAULT没有进行任何口令和资源限制.

使用PROFILE有以下一些主要事项:

       1,建立PROFILE时,如果只设置了部分口令或资源限制选项,其他选项会自动使用默认值(DEFAULT的相应选项)

       2,建立用户时,如果不指定PROFILE选项,oracle会自动将DEFAULT分配给相应的数据库用户.

       3,一个用户只能分配一个PROFILE.如果要同时管理用户的口令和资源,那么在建立PROFILE时应该同时指定口令和资源选项.

       4,使用PROFILE管理口令时,口令管理选项总是处于被激活状态,但如果使用PROFILE管理资源,必须要激活资源限制.

 

2.1 条件:

       创建profile必须要有CREATE PROFILE的系统权限。

 

为用户指定资源限制,必须:

1.动态地使用alter system或使用初始化参数resource_limit使资源限制生效。该改变对密码资源无效,密码资源总是可用。

SQL> show parameter resource_limit

NAME                   TYPE        VALUE

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

resource_limit             boolean     FALSE

SQL>  alter system set resource_limit=true;

System altered.

SQL> show parameter resource_limit

NAME                  TYPE        VALUE

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

resource_limit            boolean     TRUE

SQL>

 

2.使用create profile创建一个定义对数据库资源进行限制的profile。

SQL> create profile test

  2  limit

  3  idle_time 30  --单位分钟

  4  connect_time 480;

Profile created.

 

CONNECT_TIME Specify the total elapsed time limit for a session, expressed in minutes.

IDLE_TIME Specify the permitted periods of continuous inactive time during a session, expressed in minutes. Long-running queries and other operations are not subject to this limit.

 

3.使用create user 或alter user命令把profile分配给用户。

SQL> create user qs identified by qs profile test;  --创建用户时指定profile

User created.

SQL> alter user qs profile test;  --修改用户的profile

User altered.

SQL>

SQL> alter user dinya profile default;  --还原默认值

 

4.修改PROFILE

SQL> alter profile test limit idle_time 60;

Profile altered.

 

5.删除PROFILE

SQL> drop profile test;

SQL> drop profile test cascade;

 

注意:

1.已分配的profile,删除时必须加cascade选项。

2.必须要有create profile 权限,才能创建profile。

3.DEFAULT为默认profile,不能删除。

 

6.信息获取  

可以从dba_profiles表和dba_users表查询profile的信息,如:

 

SQL> set wrap off;

SQL> select profile from dba_users where username='QS';

PROFILE

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

TEST

SQL> select * from dba_profiles where profile='TEST';

 

PROFILE                        RESOURCE_NAME                    RESOURCE LIMIT

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

TEST                           COMPOSITE_LIMIT                  KERNEL   DEFAULT

TEST                           SESSIONS_PER_USER                KERNEL   DEFAULT

TEST                           CPU_PER_SESSION                  KERNEL   DEFAULT

TEST                           CPU_PER_CALL                     KERNEL   DEFAULT

TEST                           LOGICAL_READS_PER_SESSION        KERNEL   DEFAULT

TEST                           LOGICAL_READS_PER_CALL           KERNEL   DEFAULT

TEST                           IDLE_TIME                        KERNEL   60

TEST                           CONNECT_TIME                     KERNEL   480

TEST                           PRIVATE_SGA                      KERNEL   DEFAULT

TEST                           FAILED_LOGIN_ATTEMPTS            PASSWORD DEFAULT

TEST                           PASSWORD_LIFE_TIME               PASSWORD DEFAULT

 

PROFILE                        RESOURCE_NAME                    RESOURCE LIMIT

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

TEST                           PASSWORD_REUSE_TIME              PASSWORD DEFAULT

TEST                           PASSWORD_REUSE_MAX               PASSWORD DEFAULT

TEST                           PASSWORD_VERIFY_FUNCTION         PASSWORD DEFAULT

TEST                           PASSWORD_LOCK_TIME               PASSWORD DEFAULT

TEST                           PASSWORD_GRACE_TIME              PASSWORD DEFAULT

 

16 rows selected.

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