段指导-示例 - 技术栈

RDBMS 19.20

参考文档：

Database Administrator's Guide

19 Managing Space for Schema Objects

19.3.2.4 Running the Segment Advisor Manually

针对表SOE.CUSTOMERS进行段指导

-- 创建段指导

复制代码

variable id number;
begin
  declare
  name varchar2(100);
  descr varchar2(500);
  obj_id number;
  begin
  name:='Manual_Employees';
  descr:='Segment Advisor Example';

  dbms_advisor.create_task (
    advisor_name     => 'Segment Advisor',
    task_id          => :id,
    task_name        => name,
    task_desc        => descr);

  dbms_advisor.create_object (
    task_name        => name,
    object_type      => 'TABLE',
    attr1            => 'SOE',
    attr2            => 'CUSTOMERS',
    attr3            => NULL,
    attr4            => NULL,
    attr5            => NULL,
    object_id        => obj_id);

  dbms_advisor.set_task_parameter(
    task_name        => name,
    parameter        => 'recommend_all',
    value            => 'TRUE');

  dbms_advisor.execute_task(name);
  end;
end; 
/

-- 查看段指导是否运行完毕

复制代码

select task_name, status
  from dba_advisor_tasks
 where task_name = 'Manual_Employees'
   and advisor_name = 'Segment Advisor';

-- 查看段指导对应的结果

复制代码

select af.task_name, ao.attr2 segname, ao.attr3 partition, ao.type, af.message 
  from dba_advisor_findings af, dba_advisor_objects ao
  where ao.task_id = af.task_id
  and ao.object_id = af.object_id
  and af.task_name = 'Manual_Employees'

select task_name,message,more_info from dba_advisor_findings  where task_name = 'Manual_Employees'
--select * from DBA_ADVISOR_RECOMMENDATIONS where task_name = 'Manual_Employees'
--select * from DBA_ADVISOR_ACTIONS where task_name = 'Manual_Employees'
select task_name,command,attr1,attr2,attr3 from DBA_ADVISOR_ACTIONS where task_name like '%SYS_AUTO_SPCADV%'
select * from DBA_ADVISOR_OBJECTS where task_name = 'Manual_Employees'

-- 查看近期的段指导建议

复制代码

select tablespace_name,
       segment_name,
       segment_type,
       partition_name,
       recommendations,
       c1
  from table(dbms_space.asa_recommendations('FALSE', 'FALSE', 'FALSE'));

--部分结果示例

复制代码

SYS@test>select task_name,message,more_info from dba_advisor_findings  where task_name = 'Manual_Employees'
  2  ;

TASK_NAME
--------------------------------------------------------------------------------
MESSAGE
--------------------------------------------------------------------------------
MORE_INFO
--------------------------------------------------------------------------------
Manual_Employees
The free space in the object is less than 10MB.
Allocated Space:180355072: Used Space:178803055: Reclaimable Space :1552017:


SYS@test>

SYS@test>select task_name,command,attr1,attr2,attr3 from DBA_ADVISOR_ACTIONS where task_name like '%SYS_AUTO_SPCADV%';

TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
SYS_AUTO_SPCADV126200902092023
SHRINK SPACE
alter table "OGG"."GGS_DDL_HIST" shrink space

TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
alter table "OGG"."GGS_DDL_HIST" shrink space COMPACT
alter table "OGG"."GGS_DDL_HIST" enable row movement


TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
SYS_AUTO_SPCADV126200902092023
ENABLE COMPRESSION
alter table "SOE"."ORDERS"  compress for oltp

TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
alter table "SOE"."ORDERS"  move



TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
SYS_AUTO_SPCADV126200902092023
ENABLE COMPRESSION
alter table "SOE"."CUSTOMERS"  compress for oltp

TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
alter table "SOE"."CUSTOMERS"  move



TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
SYS_AUTO_SPCADV126200902092023
ENABLE COMPRESSION
alter table "OGG"."GGS_DDL_HIST"  compress for oltp

TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
alter table "OGG"."GGS_DDL_HIST"  move



TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
SYS_AUTO_SPCADV258251302092023
SHRINK SPACE
alter table "OGG"."GGS_DDL_HIST" shrink space

TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
alter table "OGG"."GGS_DDL_HIST" shrink space COMPACT
alter table "OGG"."GGS_DDL_HIST" enable row movement


TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
SYS_AUTO_SPCADV616480909092023
SHRINK SPACE
alter table "OGG"."GGS_DDL_HIST" shrink space

TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
alter table "OGG"."GGS_DDL_HIST" shrink space COMPACT
alter table "OGG"."GGS_DDL_HIST" enable row movement


TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
SYS_AUTO_SPCADV705541309092023
SHRINK SPACE
alter table "OGG"."GGS_DDL_HIST" shrink space

TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
alter table "OGG"."GGS_DDL_HIST" shrink space COMPACT
alter table "OGG"."GGS_DDL_HIST" enable row movement


TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
SYS_AUTO_SPCADV705541309092023
ENABLE COMPRESSION
alter table "OGG"."GGS_DDL_HIST"  compress for oltp

TASK_NAME
--------------------------------------------------------------------------------
COMMAND
----------------------------------------------------------------
ATTR1
--------------------------------------------------------------------------------
ATTR2
--------------------------------------------------------------------------------
ATTR3
--------------------------------------------------------------------------------
alter table "OGG"."GGS_DDL_HIST"  move



8 rows selected.

SYS@test>

END