OCP-1Z0-053-V13.02-225题

225.View the Exhibit to examine the Automatic Database Diagnostic Monitor (ADDM) tasks. You executed

the following commands:

SQL> VAR tname VARCHAR2(60);

SQL> BEGIN :tname := 'my_instance_analysis_mode_task';

DBMS_ADDM.INSERT_SEGMENT_DIRECTIVE(:tname,'Sg_directive','SCOTT');

END;

Which statement describes the consequence?

A. The ADDM task is filtered to suppress the Segment Advisor suggestions for the SCOTT schema.

B. The ADDM task is filtered to produce the Segment Advisor suggestions for the SCOTT schema only.

C. The PL/SQL block produces an error because the my_instance_analysis_mode_task task has not been reset to its initial state.

D. All subsequent ADDM tasks including my_instance_analysis_mode_task are filtered to suppress the Segment Advisor suggestions for the SCOTT schema.

Answer: C

答案解析：

参考：http://docs.oracle.com/cd/E11882_01/appdev.112/e40758/d_addm.htm#ARPLS65067

实验验证：

sys@TEST1107> VAR tname VARCHAR2(60);

sys@TEST1107> BEGIN :tname := 'my_instance_analysis_mode_task';

  2  DBMS_ADDM.INSERT_SEGMENT_DIRECTIVE(:tname,'Sg_directive','SCOTT');

  3  END;

  4  /

PL/SQL procedure successfully completed.

sys@TEST1107> SELECT DBMS_ADVISOR.GET_TASK_REPORT(:tname, 'TEXT', 'ALL') FROM DUAL;

ERROR:

ORA-13631: The most recent execution of task my_instance_analysis_mode_task contains no results.

ORA-06512: at "SYS.PRVT_ADVISOR", line 3189

ORA-06512: at "SYS.DBMS_ADVISOR", line 590

ORA-06512: at line 1

no rows selected

 

 

DBMS_ADDM.ANALYZE_INST缺少分析，会报错。

INSERT_SEGMENT_DIRECTIVE Procedure

Creates a directive to prevent ADDM from creating actions to "run Segment Advisor" for specific segments

INSERT_SEGMENT_DIRECTIVE Procedure

This procedure creates a directive to prevent ADDM from creating actions to "run Segment Advisor" for specific segments. The directive can be created for a specific task (only when the task is in INITIAL status), or for all subsequently created ADDM tasks (such as a system directive).

Syntax

DBMS_ADDM.INSERT_SEGMENT_DIRECTIVE (

   task_name             IN VARCHAR2,

   dir_name              IN VARCHAR2,

   owner_name            IN VARCHAR2,

   object_name           IN VARCHAR2 := NULL,

   sub_object_name       IN VARCHAR2 := NULL);

 

DBMS_ADDM.INSERT_SEGMENT_DIRECTIVE (

   task_name             IN VARCHAR2,

   dir_name              IN VARCHAR2,

   object_number         IN NUMBER);

Parameters

Table 16-14 INSERT_SEGMENT_DIRECTIVE Procedure Parameters

Parameter	Description
task_name	Name of the task this directive applies to. If the value is NULL, it applies to all subsequently created ADDM Tasks.
dir_name	Name of the directive. All directives must be given unique names.
owner_name	Specifies the owner of the segment/s to be filtered. A wildcard is allowed in the same syntax used for "like" constraints.
object_name	Name of the main object to be filtered. Again, wildcards are allowed. The default value of NULL is equivalent to a value of '%'.
sub_object_name	Name of the part of the main object to be filtered. This could be a partition name, or even sub partitions (separated by a '.'). Again, wildcards are allowed. The default value of NULL is equivalent to a value of '%'.
object_number	Object number of the SEGMENT that this directive is to filter, found in views DBA_OBJECTS or DBA_SEGMENTS

Examples

A new ADDM task is created to analyze a local instance. However, it has special treatment for all segments that belong to user SCOTT. The result of GET_REPORT does not show actions for running Segment advisor for segments that belong to SCOTT.

var tname VARCHAR2(60);

BEGIN

  DBMS_ADDM.INSERT_SEGMENT_DIRECTIVE(NULL,

                                     'my Segment directive',

                                     'SCOTT');

  :tname := 'my_instance_analysis_mode_task';

  DBMS_ADDM.ANALYZE_INST(:tname, 1, 2);

END;

To see a report containing all actions regardless of the directive:

SELECT DBMS_ADVISOR.GET_TASK_REPORT(:tname, 'TEXT', 'ALL') FROM DUAL;