数据库管理-第九十三期 19c OCM之路-第四堂（01）（20230719）

第九十三期 19c OCM之路-第四堂（01）（20230719）

距离上一期19c OCM之路已经过去了整整8天了，这中间发生的事情详见第九十二期。本期来到第四堂Performance management性能管理，但是一开始需要把上一堂的一些内容做一些调整和补遗。

第三堂调整与补遗

1. Additional configuration 其他配置
   在上一堂的其他配置中，我是把并行相关内容放过去了，但是细度考点，新的考试内容是把并行放在了第四堂，因此放在那边不大合适。关于其他可能涉及的考试内容在这里补充一下：

-- 使用安全文件
create table profiles (id number,first_name varchar2(40),last_name varchar2(80),profile_info clob) lob(profile_info) store as securefile (tablespace sf_data compress low);

alter system set db_securefile=permitted;

-- 开启表闪回（根据题目要求）
sqlplus sys/oracle@pdbprod1 as sysdba
	create tablespace fra_tbs datafile '/u01/app/oracle/oradata/PRODCDB/PDBPROD1/fra_tbs01.dbf' size 20m autoextend on;
	create user fra_admin identified by oracle default tablespace fra_tbs quota unlimited on fra_tbs account unlock;
	grant dba,flashback archive administer to fra_admin;

sqlplus fra_admin/oracle@pdbprod1
	create flashback archive fra1 tablespace fra_tbs retention 1 year;
	alter table sh.promotions flashback archive fra1;

2. 考点4：Managing Partitioning 管理分区
   这里可能遇到外键分区表：

原表：
create table orders
(
	order_id number(6),
	order_date date,
	order_mode varchar2(10),
	customer_id number(8,2),
	order_status number(2),
	order_total number(8,2),
	sales_rep_id number(6),
	constraint order_id_pk primary key(order_id)
) 
partition by range(order_date)
(
	partition 01_2005 values less than (to_date('01-APR-2005','dd-mon-yyyy')),
	partition 02_2005 values less than (to_date('01-JUL-2005','dd-mon-yyyy'),
	partition 03_2005 values less than (to_date('01-0CT-2005','dd-mon-yyyy'),
	partition 04_2005 values less than (to_date('01-JAN-2006','dd-mon-yyy')
);

-- 外键分区表
create table order_items
(
	order_id number(12) not null,
	line_item_id number(3),
	product _id number(6),
	unit_price number(8,2),
	quantity number(8),
	constraint order_items_fk foreign key(order_id),
	references orders(order_id)
)
partition by reference(order_items_fk);

3. 考点8：Auditing 审计
   除了关于审计的数据库参数调整以为，应该还会有FGA（Fine-Grained Audit，细粒度审计）的相关考试内容：

BEGIN
	dbms_fga.add_policy(
		object_schema=>'HR',
		object_name=>'EMPOLYEES',
		policy_name=>'SALARY',
		audit_condition=>'salary is not null and commission_pct is not null',
		audit_column=>'salary,commission_pct',
		statement_types=>'select',
		audit_trail=>DBMS_FGA.DB_EXTENDED,
		audit_column_opts=>DBMS_FGA.ALL_COLUMNS
	);
END;
/

官方文档路径如下：
Oracle Database 19c
PL/SQL Packages and Types Reference
\qquad -> 69 DBMS_FGA
\qquad\qquad -> 69.3 Summary of DBMS_FGA Subprograms
\qquad\qquad\qquad -> 69.3.1 ADD_POLICY Procedure

考点0 将host01加入EMCC管理

本堂后后面的一些操作是可以通过EMCC来操作的，因此需要将host01加入EMCC管理，具体操作这里不再赘述，请前往数据库管理-第八十一期 保姆级EMCC搭建教程（20230606）查看。

考点1：Create synonym 创建同义词：

CREATE [OR REPLACE] [PUBLIC] SYNONYM [当前用户.]synonym_name
FOR [其他用户.]object_name;

create public synonym sales for sh.sale;

考点2：Configure Resource Manager 配置资源管理

官方文档路径如下：
Oracle Database 19c
Database Administrator’s Guide
-> Oracle® Database
\qquad -> Part IV Database Resource Management and Task Scheduling
\qquad\qquad -> 27 Managing Resources with Oracle Database Resource Manager
\qquad\qquad\qquad -> 27.1 About Oracle Database Resource Manager
\qquad\qquad\qquad\qquad ->27.1.3 About Resource Manager Administration Privileges
-> Oracle® Multitenant
\qquad -> Part V Using Oracle Features in a Multitenant Environment
\qquad\qquad -> 22 Using Oracle Resource Manager for PDBs
\qquad\qquad\qquad -> Managing CDB Resource Plans
\qquad\qquad\qquad\qquad -> Creating a CDB Resource Plan for Managing PDBs
->Oracle® Database
\qquad ->Part IV Database Resource Management and Task Scheduling
\qquad\qquad ->27 Managing Resources with Oracle Database Resource Manager
\qquad\qquad\qquad ->27.5 Creating a Complex Resource Plan
\qquad\qquad\qquad\qquad ->27.5.3 Creating Resource Consumer Groups
\qquad\qquad\qquad\qquad ->27.5.5 Creating a Resource Plan
\qquad\qquad\qquad\qquad ->27.5.6 Creating Resource Plan Directives

这里将12c OCM升级试的考点引入，建议使用EMCC来做：

1. Assign SYSTEM user as a resource adminstrator privileges.
2. Create resource plans to DAYTIME for PRODCDB and active it
   pdbprod1 get 6 parts shared resource of CDB
   pdbprod2 get 3 parts shared resource of CDB
   pdbprod3 get 1 parts shared resource of CDB
   PDB cannot get the extra 75% of availiable CPU time
   PDB cannot get the extra 50% parallel_servers_target
   可参考Oracle数据库管理每周一例（12.2,18c,19c） 2020-06-28
3. Create two consumer group OLTP and OLAP in the pdbprod1, use comments indicated the group used.
4. Create a resource management plan in pdbprod1
   a) Resource plan name: DAYTIMEPDB1
   b) For OLTP group cannot be allowed more than 25 active sessions. If 26 users try to log on, wait 90 seconds later, this connection will be terminated
   c) OLAP group has the maximum number of active sessions to 8. If you need extra eight sessions, the connection will be terminated after 150 seconds
   d) In OLTP group, an accepted longest query execution time is 5 seconds, if the query estimate exceeds 5 seconds, the query should be eliminated
   e) The maximum undo size for OLTP group is 350MB
   f)the CPU ratio for OLTP, OLAP and OTHER_GROUPS are 50, 40 and 10 respectively
   g) OLAP group should limit the degree of paralleism at 30
   h) If the session of OLAP group exceeds 8000 I/O or data transmission over 2000MB, it should be temporary put into LOW_GROUP group. When the call is complete, the session is returned back to the original group
   i) Active the plan

--题目1
sqlplus sys/oracle@prodcdb as sysdba
BEGIN
	DBMS_RESOURCE_MANAGER_PRIVS.GRANT_SYSTEM_PRIVILEGE(
	GRANTEE_NAME =>'SYSTEM',
	PRIVILEGE_NAME => 'ADMINISTER_RESOURCE_MANAGER',
	ADMIN_OPTION => FALSE);
END;
/

--题目2
sqlplus sys/oracle@prodcdb as sysdba
exec DBMS_RESOURCE_MANAGER.CLEAR_PENDING_AREA();
exec DBMS_RESOURCE_MANAGER.CREATE_PENDING_AREA();

BEGIN
  DBMS_RESOURCE_MANAGER.CREATE_CDB_PLAN(
    plan		=> 'DAYTIME',
    comment		=> 'CDB resource plan');
END;
/

BEGIN
  DBMS_RESOURCE_MANAGER.CREATE_CDB_PLAN_DIRECTIVE(
    plan					=> 'DAYTIME', 
    pluggable_database		=> 'pdbprod1', 
    shares					=> 6, 
    utilization_limit		=> 75,
    parallel_server_limit	=> 50);
END;
/

BEGIN
  DBMS_RESOURCE_MANAGER.CREATE_CDB_PLAN_DIRECTIVE(
    plan					=> 'DAYTIME', 
    pluggable_database		=> 'pdbprod2', 
    shares					=> 3, 
    utilization_limit		=> 75,
    parallel_server_limit	=> 50);
END;
/

BEGIN
  DBMS_RESOURCE_MANAGER.CREATE_CDB_PLAN_DIRECTIVE(
    plan					=> 'DAYTIME', 
    pluggable_database		=> 'pdbprod3', 
    shares					=> 1, 
    utilization_limit		=> 75,
    parallel_server_limit	=> 50);
END;
/

-- exec DBMS_RESOURCE_MANAGER.VALIDATE_PENDING_AREA();
exec DBMS_RESOURCE_MANAGER.SUBMIT_PENDING_AREA();

ALTER SYSTEM SET RESOURCE_MANAGER_PLAN = 'DAYTIME';

--题目3
sqlplus sys/oracle@pdbprod1 as sysdba
exec DBMS_RESOURCE_MANAGER.CLEAR_PENDING_AREA();
exec DBMS_RESOURCE_MANAGER.CREATE_PENDING_AREA();

BEGIN
  DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP (
   CONSUMER_GROUP => 'OLTP',
   COMMENT        => 'OLTP applications');
END;
/
exec DBMS_RESOURCE_MANAGER.SUBMIT_PENDING_AREA();

exec DBMS_RESOURCE_MANAGER.CLEAR_PENDING_AREA();
exec DBMS_RESOURCE_MANAGER.CREATE_PENDING_AREA();

BEGIN
  DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP (
   CONSUMER_GROUP => 'OLAP',
   COMMENT        => 'OLAP applications');
END;
/
exec DBMS_RESOURCE_MANAGER.SUBMIT_PENDING_AREA();

--题目4
sqlplus sys/oracle@pdbprod1 as sysdba
exec DBMS_RESOURCE_MANAGER.CLEAR_PENDING_AREA();
exec DBMS_RESOURCE_MANAGER.CREATE_PENDING_AREA();

BEGIN
  DBMS_RESOURCE_MANAGER.CREATE_PLAN(
   PLAN    => 'DAYTIMEPDB1');
END;
/
exec DBMS_RESOURCE_MANAGER.SUBMIT_PENDING_AREA();



BEGIN
  DBMS_RESOURCE_MANAGER.CLEAR_PENDING_AREA();
  DBMS_RESOURCE_MANAGER.CREATE_PENDING_AREA();
  
  DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE (
   PLAN                     => 'DAYTIMEPDB1', 
   GROUP_OR_SUBPLAN         => 'OLTP',
   COMMENT                  => 'OLTP group',
   MGMT_P1                  => 50,
   ACTIVE_SESS_POOL_P1      => 25,
   QUEUEING_P1				=> 90,
   SWITCH_GROUP				=> 'CANCEL_SQL',
   SWITCH_TIME				=> 5,
   MAX_EST_EXEC_TIME		=> 5,
   UNDO_POOL				=> 358400);

  DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE (
   PLAN                     => 'DAYTIMEPDB1', 
   GROUP_OR_SUBPLAN         => 'OLAP',
   COMMENT                  => 'OLAP group',
   MGMT_P1                  => 40,
   PARALLEL_DEGREE_LIMIT_P1 => 30,
   ACTIVE_SESS_POOL_P1      => 8,
   QUEUEING_P1				=> 150,
   SWITCH_GROUP				=> 'LOW_GROUP',
   SWITCH_IO_MEGABYTES		=> 2000,
   SWITCH_IO_REQS			=> 8000,
   SWITCH_FOR_CALL			=> TRUE);

  DBMS_RESOURCE_MANAGER.CREATE_PLAN_DIRECTIVE (
   PLAN                     => 'DAYTIMEPDB1', 
   GROUP_OR_SUBPLAN         => 'OTHER_GROUPS',
   COMMENT                  => 'OTHER group',
   MGMT_P1                  => 10);
  DBMS_RESOURCE_MANAGER.SUBMIT_PENDING_AREA()
END;
/

alter system set resource_manager_plan='DAYTIMEPDB1';

总结

本堂考试考点2的内容着实有点多，本堂剩余内容放在后面。
老规矩，知道写了些啥。