怎么用pending area创建资源计划
本篇内容介绍了“怎么用pending area创建资源计划”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
两个DBMS包
DBMS_RESOURCE_MANAGER 管理资源计划
DBMS_RESOURCE_MANAGER_PRIVS 给用户授予管理资源的权限
plan schema：
包括一个顶计划和下面的子计划和消耗组
自计划的配额也是以100%为基础来分配的
创建简单的资源计划：
CREATE_SIMPLE_PLAN里最多可以建8个组
BEGIN
DBMS_RESOURCE_MANAGER.CREATE_SIMPLE_PLAN(SIMPLE_PLAN => 'simple_plan1',
CONSUMER_GROUP1 => 'mygroup1', GROUP1_CPU => 80,
CONSUMER_GROUP2 => 'mygroup2', GROUP2_CPU => 20);
END;
这种方式不需要创建pending area.
用pending area创建资源计划
在创建资源计划前，必须创建pending area，创建资源计划后，必须验证并提交pending area
创建pending_area
EXEC DBMS_RESOURCE_MANAGER.CREATE_PENDING_AREA;
验证
EXEC DBMS_RESOURCE_MANAGER.VALIDATE_PENDING_AREA;
提交（提交后会自动释放pending area）
EXEC DBMS_RESOURCE_MANAGER.SUBMIT_PENDING_AREA;
手动释放
EXEC DBMS_RESOURCE_MANAGER.CLEAR_PENDING_AREA;
资源计划的参数
PLAN 资源计划名称
COMMENT 描述
CPU_MTH CPU分配方式，包括EMPHASIS（按百分比）和RATIO（按比例，几比几比几）。其中EMPHASIS是默认的
ACTIVE_SESS_POOL_MTH 最多可以有多少个活动session，默认为ACTIVE_SESS_POOL_ABSOLUTE
PARALLEL_DEGREE_LIMIT_MTH 并行度，默认 PARALLEL_DEGREE_LIMIT_ABSOLUTE
QUEUEING_MTH 队列资源分配方式，决定哪些session先执行。默认FIFO_TIMEOUT
创建资源计划
EXEC DBMS_RESOURCE_MANAGER.CREATE_PLAN(PLAN => 'great_bread', COMMENT => 'great plan');
修改资源计划
EXEC DBMS_RESOURCE_MANAGER.UPDATE_PLAN(PLAN => 'great_bread', NEW_COMMENT => 'great plan for great bread');
删除资源计划
EXEC DBMS_RESOURCE_MANAGER.DELETE_PLAN(PLAN => 'great_bread'); --只删除计划，不删除对应的资源组
级联删除用DELETE_PLAN_CASCADE
Ratio策略
决定在一个level里各资源组可以得到的CPU比例。
下面给Gold service,Silver service,Bonze service,Lowest service设置了10比5比2比1的比例.
如果当前只有gold service 和 sliver service存在，则它俩按10比5来分配。
DBMS_RESOURCE_MANAGER.CREATE_PLAN
(PLAN => 'service_level_plan',
CPU_MTH -> 'RATIO',
COMMENT => 'service level plan');
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE
(PLAN => 'service_level_plan',
GROUP_OR_SUBPLAN => 'GOLD_CG',
COMMENT => 'Gold service level customers',
CPU_P1 => 10);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE
(PLAN => 'service_level_plan',
GROUP_OR_SUBPLAN => 'SILVER_CG',
COMMENT => 'Silver service level customers',
CPU_P1 => 5);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE
(PLAN => 'service_level_plan',
GROUP_OR_SUBPLAN => 'BRONZE_CG',
COMMENT => 'Bonze service level customers',
CPU_P1 => 2);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE
(PLAN => 'service_level_plan',
GROUP_OR_SUBPLAN => 'OTHER_GROUPS',
COMMENT => 'Lowest priority sessions',
CPU_P1 => 1);
创建资源消耗组
参数：
CONSUMER_GROUP 名称
COMMENT 描述
CPU_MTH CPU分配方式，默认为ROUND_ROBIN，使用ROUND_ROBIN cheduler来session正确执行。还有RUN_TO_COMPLETION选项
特殊资源消耗组（无法修改和删除）
DEFAULT_CONSUMER_GROUP 所有未明确指定消耗组的用户和session的默认消耗组。
OTHER_GROUPS 不能被明确指定给用户，应用于所有不在当前plan schema中的消耗组的用户。
同时，还有ORACLE提供的SYSTEM_PLAN 资源计划下的SYS_GROUP和LOW_GROUP两个消耗组
创建消耗组
创建之前必须创建pending area
EXEC DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP (CONSUMER_GROUP => 'sales', COMMENT => 'retail and wholesale sales');
修改消耗组
UPDATE_CONSUMER_GROUP
删除消耗组
DELETE_CONSUMER_GROUP
创建资源计划指令 resource plan directives
资源计划指令将消耗组分配到资源计划中，并为各种分配方式指定参数
参数：
PLAN 计划名称
GROUP_OR_SUBPLAN 消耗组活子计划名称
COMMENT 备注
CPU_P1到CPU_P8 对于EMPHASIS方式，指定当前级别的百分比，对于RATIO，指定分配比例，RATIO只对CPU_P1有效，对后面的级别不适用。
ACTIVE_SESS_POOL_P1 最大活动session数，默认UNLIMITED
QUEUEING_P1 队列中的超时时间，默认UNLIMITED
PARALLEL_DEGREE_LIMIT_P 并行度，默认UNLIMITED
SWITCH_GROUP
SWITCH_TIME
SWITCH_ESTIMATE
MAX_EST_EXEC_TIME
UNDO_POOL
MAX_IDLE_TIME session的最大空闲时间
MAX_IDLE_BLOCKER_TIME 被阻塞的session的最大空闲时间
SWITCH_TIME_IN_CALL
创建resource plan directive
BEGIN
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE (
PLAN => 'great_bread',
GROUP_OR_SUBPLAN => 'sales',
COMMENT => 'sales group',
CPU_P1 => 60,
PARALLEL_DEGREE_LIMIT_P1 => 4);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE (
PLAN => 'great_bread',
GROUP_OR_SUBPLAN => 'market',
COMMENT => 'marketing group',
CPU_P1 => 20);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE (
PLAN => 'great_bread',
GROUP_OR_SUBPLAN => 'develop',
COMMENT => 'development group',
CPU_P1 => 20);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE (
PLAN => 'great_bread',
GROUP_OR_SUBPLAN =>'OTHER_GROUPS',
COMMENT => 'this one is required',
CPU_P1 => 0,
CPU_P2 => 100);
END;
修改resource plan directive
EXEC DBMS_RESOURCE_MANAGER.UPDATE_PLAN_DIRECTIVE (
PLAN => 'great_bread',
GROUP_OR_SUBPLAN => 'develop',
NEW_CPU_P1 => 15);
删除
DELETE_PLAN_DIRECTIVE
管理消耗组
用到的存储过程
SET_CONSUMER_GROUP_MAPPING
SET_CONSUMER_GROUP_MAPPING_PRI
改变正在执行的session的消耗组
可以不用踢出session的情况下改变CPU等配额。
参数是session的 sid,serial#和消耗组名称
EXEC DBMS_RESOURCE_MANAGER.SWITCH_CONSUMER_GROUP_FOR_SESS (
'17',
'12345',
'high_priorty');
改变用户的消耗组
EXEC DBMS_RESOURCE_MANAGER.SWITCH_CONSUMER_GROUP_FOR_USER (
'scott',
'low_group');
用DBMS_SESSION包切换消耗组
如果被授予过switch权限，用户可以改变自己的消耗组
参数：
NEW_CONSUMER_GROUP 新组
OLD_CONSUMER_GROUP 老组（这个是OUT型的参数）
INITIAL_GROUP_ON_ERROR 切换发生错误的时候的行为，TRUE表示切换错误的时候，用户切换到初始消耗组，FALSE表示发生错误就报错
例子：
SET serveroutput on
DECLARE
old_group varchar2(30);
BEGIN
DBMS_SESSION.SWITCH_CURRENT_CONSUMER_GROUP('sales', old_group, FALSE);
DBMS_OUTPUT.PUT_LINE('OLD GROUP = ' || old_group);
END;
允许用户将自己切换到指定消耗组
EXEC DBMS_RESOURCE_MANAGER_PRIVS.GRANT_SWITCH_CONSUMER_GROUP (
'scott',
'bug_batch_group（组名）', TRUE（SCOTT也可以授权别人切换到该组）);
收回切换权限
EXEC DBMS_RESOURCE_MANAGER_PRIVS.REVOKE_SWITCH_CONSUMER_GROUP (
'scott',
'bug_batch_group');
将session自动映射到消耗组
通过session的属性和消耗组自动连接，分为login attributes和runtime attributes两种属性
使用的存储过程：
SET_CONSUMER_GROUP_MAPPING
SET_CONSUMER_GROUP_MAPPING_PRI
创建映射
参数：
ATTRIBUTE
VALUE
CONSUMER_GROUP
其中ATTRIBUTE支持的属性：
Login属性：
ORACLE_USER
SERVICE_NAME
CLIENT_OS_USER
CLIENT_PROGRAM
CLIENT_MACHINE
Runtime属性：
MODULE_NAME
MODULE_NAME_ACTION
SERVICE_MODULE
SERVICE_MODULE_ACTION
例子：
将sys映射到backup_cg
BEGIN
DBMS_RESOURCE_MANAGER.CREATE_PENDING_AREA();
DBMS_RESOURCE_MANAGER.SET_CONSUMER_GROUP_MAPPING
(DBMS_RESOURCE_MANAGER.ORACLE_USER, 'sys', 'backup_cg');
DBMS_RESOURCE_MANAGER.VALIDATE_PENDING_AREA();
DBMS_RESOURCE_MANAGER.SUBMIT_PENDING_AREA();
END;
设置session属性作为映射条件时的优先级
其中必须制定EXPLICIT ，并且EXPLICIT 必须为1
BEGIN
DBMS_RESOURCE_MANAGER.SET_CONSUMER_GROUP_MAPPING_PRI(
EXPLICIT => 1,
SERVICE_MODULE_ACTION => 2,
SERVICE_MODULE => 3,
MODULE_NAME_ACTION => 4,
MODULE_NAME => 5,
SERVICE_NAME => 6,
ORACLE_USER => 7,
CLIENT_PROGRAM => 8,
CLIENT_OS_USER => 9,
CLIENT_MACHINE => 10);
END;
使资源计划生效
ALTER SYSTEM SET RESOURCE_MANAGER_PLAN = 'mydb_plan';
加上FORCE：可以禁止scheduler自动切换资源计划
ALTER SYSTEM SET RESOURCE_MANAGER_PLAN = 'FORCE:mydb_plan';
下面是官方文档给出的一个练习例子
BEGIN
DBMS_RESOURCE_MANAGER.CREATE_PENDING_AREA();
DBMS_RESOURCE_MANAGER.CREATE_PLAN(PLAN => 'bugdb_plan', COMMENT => 'Resource plan/method for bug users sessions');
DBMS_RESOURCE_MANAGER.CREATE_PLAN(PLAN => 'maildb_plan', COMMENT => 'Resource plan/method for mail users sessions');
DBMS_RESOURCE_MANAGER.CREATE_PLAN(PLAN => 'mydb_plan', COMMENT => 'Resource plan/method for bug and mail users sessions');
DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP(CONSUMER_GROUP => 'Online_group', COMMENT => 'Resource consumer group/method for online bug users sessions');
DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP(CONSUMER_GROUP => 'Batch_group', COMMENT => 'Resource consumer group/method for batch job bug users sessions');
DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP(CONSUMER_GROUP => 'Bug_Maint_group', COMMENT => 'Resource consumer group/method for users sessions for bug db maint');
DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP(CONSUMER_GROUP => 'Users_group', COMMENT => 'Resource consumer group/method for mail users sessions');
DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP(CONSUMER_GROUP => 'Postman_group', COMMENT => 'Resource consumer group/method for mail postman');
DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP(CONSUMER_GROUP => 'Mail_Maint_group', COMMENT => 'Resource consumer group/method for users sessions for mail db maint');
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'bugdb_plan',
GROUP_OR_SUBPLAN => 'Online_group',
COMMENT => 'online bug users sessions at level 1', CPU_P1 => 80, CPU_P2=> 0,
PARALLEL_DEGREE_LIMIT_P1 => 8);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'bugdb_plan',
GROUP_OR_SUBPLAN => 'Batch_group',
COMMENT => 'batch bug users sessions at level 1', CPU_P1 => 20, CPU_P2 => 0,
PARALLEL_DEGREE_LIMIT_P1 => 2);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'bugdb_plan',
GROUP_OR_SUBPLAN => 'Bug_Maint_group',
COMMENT => 'bug maintenance users sessions at level 2', CPU_P1 => 0, CPU_P2 => 100,
PARALLEL_DEGREE_LIMIT_P1 => 3);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'bugdb_plan',
GROUP_OR_SUBPLAN => 'OTHER_GROUPS',
COMMENT => 'all other users sessions at level 3', CPU_P1 => 0, CPU_P2 => 0,
CPU_P3 => 100);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'maildb_plan',
GROUP_OR_SUBPLAN => 'Postman_group',
COMMENT => 'mail postman at level 1', CPU_P1 => 40, CPU_P2 => 0,
PARALLEL_DEGREE_LIMIT_P1 => 4);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'maildb_plan',
GROUP_OR_SUBPLAN => 'Users_group',
COMMENT => 'mail users sessions at level 2', CPU_P1 => 0, CPU_P2 => 80,
PARALLEL_DEGREE_LIMIT_P1 => 4);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'maildb_plan',
GROUP_OR_SUBPLAN => 'Mail_Maint_group',
COMMENT => 'mail maintenance users sessions at level 2', CPU_P1 => 0, CPU_P2 => 20,
PARALLEL_DEGREE_LIMIT_P1 => 2);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'maildb_plan',
GROUP_OR_SUBPLAN => 'OTHER_GROUPS',
COMMENT => 'all other users sessions at level 3', CPU_P1 => 0, CPU_P2 => 0,
CPU_P3 => 100);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'mydb_plan',
GROUP_OR_SUBPLAN => 'maildb_plan',
COMMENT=> 'all mail users sessions at level 1', CPU_P1 => 30);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'mydb_plan',
GROUP_OR_SUBPLAN => 'bugdb_plan',
COMMENT => 'all bug users sessions at level 1', CPU_P1 => 70);
DBMS_RESOURCE_MANAGER.VALIDATE_PENDING_AREA();
DBMS_RESOURCE_MANAGER.SUBMIT_PENDING_AREA();
END;
例子2
BEGIN
DBMS_RESOURCE_MANAGER.CREATE_PENDING_AREA();
DBMS_RESOURCE_MANAGER.CREATE_PLAN(PLAN => 'erp_plan', COMMENT => 'Resource plan/method for ERP Database');
DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP(CONSUMER_GROUP => 'oltp', COMMENT => 'Resource consumer group/method for OLTP jobs');
DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP(CONSUMER_GROUP => 'batch', COMMENT => 'Resource consumer group/method for BATCH jobs');
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'erp_plan',
GROUP_OR_SUBPLAN => 'oltp', COMMENT => 'OLTP sessions', CPU_P1 => 80,
SWITCH_GROUP => 'batch', SWITCH_TIME => 3,SWITCH_ESTIMATE => TRUE,
UNDO_POOL => 200);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'erp_plan',
GROUP_OR_SUBPLAN => 'batch', COMMENT => 'BATCH sessions', CPU_P2 => 100,
ACTIVE_SESS_POOL_P1 => 5, QUEUEING_P1 => 600,
MAX_EST_EXEC_TIME => 3600);
DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE(PLAN => 'erp_plan',
GROUP_OR_SUBPLAN => 'OTHER_GROUPS', COMMENT => 'mandatory', CPU_P3 => 100);
DBMS_RESOURCE_MANAGER.VALIDATE_PENDING_AREA();
DBMS_RESOURCE_MANAGER.SUBMIT_PENDING_AREA();
END;
监控、调整resource manager
查看用户消耗组权限
下例中，SCOTT可以对应MARKET和SALES两个组，他可以讲别的用户分派到SALES组，MARKET和SALES两个都不是SCOTT的初始组
SELECT * FROM DBA_Rclass="lazy" data-src_CONSUMER_GROUP_PRIVS;
GRANTEE GRANTED_GROUP GRANT_OPTION INITIAL_GROUP
------------------------------ ------------------------------ ------------ -------------
PUBLIC DEFAULT_CONSUMER_GROUP YES YES
PUBLIC LOW_GROUP NO NO
SCOTT MARKET NO NO
SCOTT SALES YES NO
SYSTEM SYS_GROUP NO YES
查看数据库中定义的资源计划
SQL> SELECT PLAN,COMMENTS,STATUS FROM DBA_Rclass="lazy" data-src_PLANS;
PLAN COMMENTS STATUS
----------- ------------------------------------------------------- ------
SYSTEM_PLAN Plan to give system sessions priority ACTIVE
BUGDB_PLAN Resource plan/method for bug users sessions ACTIVE
MAILDB_PLAN Resource plan/method for mail users sessions ACTIVE
MYDB_PLAN Resource plan/method for bug and mail users sessions ACTIVE
GREAT_BREAD Great plan for great bread ACTIVE
ERP_PLAN Resource plan/method for ERP Database ACTIVE
查看活动的session的消耗组
SQL> SELECT SID,SERIAL#,USERNAME,RESOURCE_CONSUMER_GROUP FROM V$SESSION;
SID SERIAL# USERNAME RESOURCE_CONSUMER_GROUP
----- ------- ------------------------ --------------------------------
.
.
.
11 136 SYS SYS_GROUP
13 16570 SCOTT SALES
查看当前活动的计划
SQL> ALTER SYSTEM SET RESOURCE_MANAGER_PLAN = mydb_plan;
System altered.
SQL> SELECT NAME, IS_TOP_PLAN FROM V$Rclass="lazy" data-src_PLAN;
NAME IS_TO
-------------------------------------
MYDB_PLAN TRUE
MAILDB_PLAN FALSE
BUGDB_PLAN FALSE| View | Description |
|---|---|
|
DBA_Rclass="lazy" data-src_CONSUMER_GROUP_PRIVS USER_Rclass="lazy" data-src_CONSUMER_GROUP_PRIVS | DBA view lists all resource consumer groups and the users and roles to which they have been granted. USER view lists all resource consumer groups granted to the user. |
| DBA_Rclass="lazy" data-src_CONSUMER_GROUPS | Lists all resource consumer groups that exist in the database. |
|
DBA_Rclass="lazy" data-src_MANAGER_SYSTEM_PRIVS USER_Rclass="lazy" data-src_MANAGER_SYSTEM_PRIVS | DBA view lists all users and roles that have been granted Database Resource Manager system privileges. USER view lists all the users that are granted system privileges for the DBMS_RESOURCE_MANAGER package. |
| DBA_Rclass="lazy" data-src_PLAN_DIRECTIVES | Lists all resource plan directives that exist in the database. |
| DBA_Rclass="lazy" data-src_PLANS | Lists all resource plans that exist in the database. |
| DBA_Rclass="lazy" data-src_GROUP_MAPPINGS | Lists all of the various mapping pairs for all of the session attributes |
| DBA_Rclass="lazy" data-src_MAPPING_PRIORITY | Lists the current mapping priority of each attribute |
|
DBA_USERS USERS_USERS | DBA view contains information about all users of the database. Specifically, for the Database Resource Manager, it contains the initial resource consumer group for the user. USER view contains information about the current user, and specifically, for the Database Resource Manager, it contains the current user's initial resource consumer group. |
| V$ACTIVE_SESS_POOL_MTH | Displays all available active session pool resource allocation methods. |
| V$BLOCKING_QUIESCE | Lists all sessions that could potentially block a quiesce operation. Includes sessions that are active and not in the SYS_GROUP consumer group. |
| V$PARALLEL_DEGREE_LIMIT_MTH | Displays all available parallel degree limit resource allocation methods. |
| V$QUEUEING_MTH | Displays all available queuing resource allocation methods. |
| V$Rclass="lazy" data-src_CONS_GROUP_HISTORY | For each entry in the view V$Rclass="lazy" data-src_PLAN_HISTORY, contains an entry for each consumer group in the plan showing the cumulative statistics for the consumer group. |
| V$Rclass="lazy" data-src_CONSUMER_GROUP | Displays information about active resource consumer groups. This view can be used for tuning. |
| V$Rclass="lazy" data-src_CONSUMER_GROUP_CPU_MTH | Displays all available CPU resource allocation methods for resource consumer groups. |
| V$Rclass="lazy" data-src_PLAN | Displays the names of all currently active resource plans. |
| V$Rclass="lazy" data-src_PLAN_CPU_MTH | Displays all available CPU resource allocation methods for resource plans. |
| V$Rclass="lazy" data-src_PLAN_HISTORY | Shows when Resource Manager plans were enabled or disabled on the instance. It helps you understand how resources were shared among the consumer groups over time. |
| V$Rclass="lazy" data-src_SESSION_INFO | Displays Resource Manager statistics for each session. Shows how the session has been affected by the Resource Manager. Can be used for tuning. |
| V$SESSION | Lists session information for each current session. Specifically, lists the name of the resource consumer group of each current session. |
“怎么用pending area创建资源计划”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注亿速云网站，小编将为大家输出更多高质量的实用文章！
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