PERFORMANCE TUNING

Introduction

This lesson introduces the Performance Tuning course objectives and agenda

Basic Tuning Tools

Monitoring tools overview

Enterprise Manager

V$ Views, Statistics and Metrics

Wait Events

Using Automatic Workload Repository

Managing the Automatic Workload RepositoryCreate AWR Snapshots

Real Time SQL Monitoring (a 11.1 feature new lesson in NF L-15)

Defining Problems

Defining the Problem

Limit the Scope Setting the Priority

Top SQL Reports

Common Tuning Problems Tuning During the Life Cycle

ADDM Tuning Session

Performance Versus Business Requirements

Performing Tablespace Point-in-Time Recovery

Tablespace Point-in-time Recovery Architecture

Determining the Recovery Set Tablespaces

Performing Basic RMAN Tablespace Point-in-time Recovery

Troubleshooting Tablespace Point-in-time Recovery

Performance Tuning Resources Filing a Performance Service Request

Monitoring and Tuning Tools: Overview

Using Metrics and Alerts

Metrics, Alerts, and Baselines

Limitation of Base Statistics Typical Delta Tools

Oracle Database 11g Solution: Metrics

Benefits of Metrics

Viewing Metric History Information Vsing EM to View Metric Details

Statistic Histograms Histogram Views

Database Control Usage Model Setting Thresholds

Server-Generated Alerts, Creating and Testing an Alert Metric and Alert Views

Using Baselines

Comparative Performance Analysis with AWR Baselines

Automatic Workload Repository Baselines

Moving Window Baseline

Baselines in Performance Page Settings Baseline Templates

AWR Baselines Creating AWR Baselines

Managing Baselines with PL/SQL Baseline Views

Performance Monitoring and Baselines Defining Alert Thresholds Using a Static Baseline

Using EM to Quickly Configure Changing Adaptive Threshold Settings

Using AWR Based Tools

Automatic Maintenance Tasks

ADDM Performance Monitoring

Active Session History: Overview

Monitoring an Application

What Is a Service? Service Attributes Service Types

Creating Services Managing Services in a Single-Instance Environment

Everything Switches to Services.

Using Services with Client Applications Using Services with the Resource Manager

Services and Resource Manager with EM Using Services with the Scheduler

Using Services with Parallel Operations Metric Thresholds

Service Aggregation and Tracing Service Aggregation Configuration.

Client Identifier Aggregation and Tracing Service Performance Views

Identifying Problem SQL Statements

SQL Statement Processing Phases Role of the Oracle Optimizer

Identifying Bad SQL, Real Time SQL Monitoring (a 11.1 feature new lesson in NF L-15) TOP SQL Reports

What Is an Execution Plan? Methods for Viewing Execution Plans Uses of Execution Plans

DBMS_XPLAN Package: Overview EXPLAIN PLAN Command

Reading an Execution Plan, Using the V$SQL_PLAN View Querying the AWR

SQL*Plus AUTOTRACE SQL Trace Facility

How to Use the SQL Trace Facility

Generate an Optimizer Trace

Influencing the Optimizer

Functions of the Query Optimizer, Selectivity, Cardinality and Cost Changing Optimizer Behavior

Using Hints, Optimizer Statistics Extended Statistics

Controlling the Behavior of the Optimizer with Parameters

Enabling Query Optimizer Features Influencing the Optimizer Approach

Optimizing SQL Statements, Access Paths Choosing an Access Path

Join Sort Operations

How the Query Optimizer Chooses Execution Plans for Joins

Reducing the Cost

Using SQL Performance Analyzer

Real Application Testing: Overview Use Cases

SQL Performance Analyzer: Process Capturing the SQL Workload

Creating a SQL Performance Analyzer Task SPA DBMS_SQLTUNE.CREATE_TUNING_TASK

Optimizer Upgrade Simulation SQL Performance Analyzer Task Page

Comparison Report Comparison Report SQL Detail

Tuning Regressing Statements Preventing Regressions

Parameter Change Analysis Guided Workflow Analysis

SQL Performance Analyzer: PL/SQL Example Data Dictionary Views

SQL Performance Management

Maintaining SQL Performance and Optimizer Statistics Automated Maintenance Tasks

Statistic Gathering Options Setting Statistic Preferences

Restore Statistics

Deferred Statistics Publishing: Overview Example

Automatic SQL Tuning: Overview

SQL Tuning Advisor: Overview

Using the SQL Access Advisor

SQL Plan Management: Overview

Using Database Replay

The Big Picture System Architecture

Capture Replay Considerations

Replay Options Analysis

Database Replay Workflow in Enterprise Manager

Packages and Procedures

Data Dictionary Views: Database Replay

Database Replay: PL/SQL Example

Calibrating Replay Clients

Tuning the Shared Pool

Shared Pool Architecture Operation

The Library Cache Latch and Mutex

Diagnostic Tools for Tuning the Shared Pool

Avoiding Hard Soft Parses

Sizing the Shared Pool Avoiding Fragmentation

Data Dictionary Cache SQL Query Result Cache

UGA and Oracle Shared Server

Large Pool Tuning the Large Pool

Tuning the Buffer Cache

Oracle Database Architecture: Buffer Cache

Database Buffers

Buffer Hash Table for Lookups

Working Sets

Buffer Cache Tuning Goals and Techniques

Buffer Cache Performance Symptoms Solutions

Automatically Tuned Multiblock Reads

Flushing the Buffer Cache (for Testing Only)

Tuning PGA and Temporary Space

SQL Memory Usage Performance Impact

SQL Memory Manager

Configuring Automatic PGA Memory Setting PGA_AGGREGATE_TARGET Initially

Monitoring Tuning SQL Memory Usage

PGA Target Advice Statistics Histograms

Automatic PGA and Enterprise Manager Automatic PGA and AWR Reports

Temporary Tablespace Management: Overview Monitoring Temporary Tablespace

Temporary Tablespace Shrink Tablespace Option for Creating Temporary Table

Automatic Memory Management

Oracle Database Architecture, Dynamic SGA Memory Advisories

Granule Manually Adding Granules to Components

Increasing the Size of an SGA Component, SGA Sizing Parameters Manually Resizing Dynamic SGA Parameters

Automatic Shared Memory Management Memory Broker Architecture

Behavior of Auto-Tuned Manually TunedSGA Parameters

Using the V$PARAMETER View Resizing SGA_TARGET

Disabling, Configuring Monitoring Automatic Shared Memory Management (ASMM)

Automatic Memory Management

Tuning Segment Space Usage

Space and Extent Management Locally Managed Extents

How Table Data Is Stored Anatomy of a Database Block

Minimize Block Visits

The DB_BLOCK_SIZE Parameter

Small Large Block Size: Considerations

Block Allocation, Free Lists Block Space Management with Free Lists

Automatic Segment Space Management

Migration and Chaining, Shrinking Segments Table Compression: Overview

Tuning I/O

I/O Architecture, File System Characteristics, I/O Modes Direct I/O

Bandwidth Versus Size Important I/O Metrics for Oracle Databases

I/O Calibration and Enterprise Manager, I/O Calibration and the PL/SQL Interface I/O Statistics and Enterprise Manager

Stripe and Mirror Everything

Using RAID

I/O Diagnostics

Database I/O Tuning

What Is Automatic Storage Management?

Performance Tuning Summary

Best practices identified throughout the course

Summarize the performance tuning methodology

Appendix B: Using Statspack

Installing Statspack

Capturing Statspack Snapshots

Reporting with Statspack

Statspack Considerations

Statspack and AWR Reports

Reading a Statspack Report

Statspack and AWR

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