آموزش مدیریت بانک اطلاعاتی اوراکل - بخش دوازدهم

1

faradars.org/fvorc9408

FaraDars.org

:

(Automatic Workload Repository(AWR

(Automatic Database Diagnostic Monitor(ADDM

advisory framework

alert thresholds

server-generated alerts

automated tasks 2

faradars.org/fvorc9408

FaraDars.org

Automatic

Workload

Repository

Advisory

framework

Automated

tasks

Server

alerts

Data warehouse

of the databaseAutomatic collection

of important statistics

Direct memory

access

Automatic Proactive

Efficient

Automatic

Diagnostic

Repository

Reactive

Critical

errors

3

faradars.org/fvorc9408

FaraDars.org

:(AWR) Automatic Workload Repository : AWR Baseline

. Adviser Adviser

AWR Baseline : AWR .Metric : AWR .Statistics : Object

. Threshold :

Critical .

4

faradars.org/fvorc9408

FaraDars.org

Optimizer Statistics

: . snapshot . instance .

SQL> SELECT COUNT(*) FROM hr.employees;

COUNT(*)

----------

214

SQL> SELECT num_rows FROM dba_tables

2 WHERE owner='HR' AND table_name = 'EMPLOYEES';

NUM_ROWS

----------

107

5

faradars.org/fvorc9408

FaraDars.org

6

faradars.org/fvorc9408

FaraDars.org

7

faradars.org/fvorc9408

FaraDars.org

Automatic Workload Repository (AWR)

snapshot 60

.

MMON

In-memory

statisticsSnapshots

AWRSGA

60 minutes

8

faradars.org/fvorc9408

FaraDars.org

AWR

SGA

V$ DBA_*

ADDMSelf-tuning

component

Self-tuning

component

Internal clients

External clients

EM SQL*Plus

Efficient

in-memory

statistics

collection

AWR

snapshotsMMON

9

faradars.org/fvorc9408

FaraDars.org

AWR Baselines

DBMS_WORKLOAD_REPOSITORY.CREATE_BASELINE ( -

start_snap_id IN NUMBER,

end_snap_id IN NUMBER,

baseline_name IN VARCHAR2);

Relevant period

in the past

10

faradars.org/fvorc9408

FaraDars.org

Enterprise Manager and the AWR

11

faradars.org/fvorc9408

FaraDars.org

AWR

Retention period Default: Eight days

Consider storage needs

Collection interval Default: 60 minutes

Consider storage needs and performance impact

Collection level Basic (disables most ADDM functionality)

Typical (recommended)

All (adds additional SQL tuning information to snapshots)

12

faradars.org/fvorc9408

FaraDars.org

Automatic Database Diagnostic Monitor (ADDM)

. AWR snapshot . Instance .AWR

Snapshots

ADDM

AWR

EM

ADDM results

13

faradars.org/fvorc9408

FaraDars.org

ADDM

1

2

3

14

faradars.org/fvorc9408

FaraDars.org

ADDM

15

faradars.org/fvorc9408

FaraDars.org

Advisory FrameworkADDM

SQL Tuning

Advisor

SQL Access

Advisor

Memory

Advisor

Space

SGA

Advisor

Segment Advisor

Undo Advisor

Buffer Cache

Advisor

Shared Pool

Advisor

Backup MTTR Advisor

Java Pool

Advisor

Streams Pool

Advisor

PGA

Advisor

16

faradars.org/fvorc9408

FaraDars.org

Enterprise Manager and Advisors

17

faradars.org/fvorc9408

FaraDars.org

DBMS_ADVISOR Package

GET_TASK_SCRIPT

MARK_RECOMMENDATION

SET_TASK_PARAMETER UPDATE_TASK_ATTRIBUTES

RESUME_TASK

GET_TASK_REPORT

INTERRUPT_TASK EXECUTE_TASK

DELETE_TASK CREATE_TASK

18

faradars.org/fvorc9408

FaraDars.org

Automated Maintenance Tasks

19

faradars.org/fvorc9408

FaraDars.org

Automated Maintenance Tasks Configuration

20

faradars.org/fvorc9408

FaraDars.org

Server-Generated Alerts

Server

alerts

queue.

Metric exceeds

threshold.

AWR

Enterprise Manager

Oracle instance

21

faradars.org/fvorc9408

FaraDars.org

Thresholds

22

faradars.org/fvorc9408

FaraDars.org

Alert threshold 1. 2.Alert 3.

2

3

1

23

faradars.org/fvorc9408

FaraDars.org

Alerts

24

faradars.org/fvorc9408

FaraDars.org

.

. faradars.org/fvorc9408

faradars.org/fvorc9408

FaraDars.org