Oracle Database 11g: Real Application Testing & Manageability Overview

Top 3 DBA Activities

• Performance Management• Challenge: Sustain Optimal Performance

• Change Management• Challenge: Preserve Order amid Change

• Ongoing Administration• Challenge: Manage More with Less

Source: IOUG Nov 2006 Database Survey

Sustain Optimal Performance with Self-Managing Database

Stor

age

Bac

kup

Mem

ory

App

s/SQ

L

Sche

ma

RA

C

Rec

over

y

Rep

licat

ion

Auto-TuningTuning

Advisory

InstrumentationLow Impact

Integrated

Adaptive

ADDM for RAC

• A Performance Expert, now a RAC Specialist too!

• Identifies the most “Globally Significant” performance issues

• Automatically runs every hour • Cluster-wide analysis of:

• Global cache interconnect issues• Lock manager congestion issues • Global resource contention, e.g.

IO bandwidth, hot blocks• Globally high-load SQL• Skew in instance response times

Self-Diagnostic Engine

Database-Level ADDM

Instance-Level ADDMs

Node 1 Node 2 Node 3

Automatic SQL Tuning

• Automatically captures high-load SQL

• Automatically tunes SQL without changing application by creating SQL Profiles

• Automatically implements (optional) greatly improved SQL plans

• Automatically reports analysis • Automatically runs during

maintenance window

PackagedApps

Custom Apps

Automatic SQL Tuning

Auto Capture High-Load SQL

SQL Profiles

Nightly

Well-tuned SQL

Automatic implement

Manually implement

SQL Analysis

Report

Index, MV Analysis

Ease Partition Management

Partition Advice from Access Advisor• Advise on Partitioning methods:

• Range, Range Key• Hash, Hash key• Interval (new), Interval Key

• Advise for tables,indexes, MVs• Consider entire query & DML

workload to improve query performance

Automatic Interval Partition Creation • On first insert• With constant width intervals for

dates and numbers• Existing RANGE partitioned tables

can be converted to INTERVALWell-Designed Schema

SQL Workload

PackagedApps

Customizable Apps

Access Advisor

Index, MV Advice

PartitionAnalysis

Partition Advice

Automatic Memory Tuning

• Unifies system (SGA) and process (PGA) memory management

• Single dynamic parameter for all database memory

• Automatically adapts to workload changes

• Maximizes memory utilization• Helps eliminate out- of-memory

errors• Gets and releases memory from

OS: Linux, Windows and Solaris, HPUX, AIX

• Built in safety-nets to work under runaway workloads

• Pace needy components• Not shrink below minimum

O/S MemoryO/S Memory

PGA

SGA

PGA

SGA

Streams Performance Advisor

• Auto-discovery of streams topology on multiple databases

• Automatic performance analysis across all databases

• Per-Stream Analysis: • Time-based analysis of each

component (waits, CPU, etc) using ASH

• Bottleneck components• Top wait events of bottleneck

• Per-Component Analysis:• Throughput and latency• Aborted or Enabled

• Integrate with ADDM• Stream errors are integrated with

Server-generated Alerts

ApplyDB 2 DB 3

DB 1

Capture

Queue

Propagation

Propagation

Apply

Queue

Comparative Performance Analysiswith AWR Baselines

• Performance baseline is key for tuning:

• guide set alert thresholds• monitor performance• compare advisor reports

• AWR Baseline contains a set of snapshots for “interesting or reference” time periods

• User-specifiable, schedulable, e.g.: • last Thanksgiving period• every Monday 10am-noon for 4

Mondays• Not automatically purged but can

specify expiration• Automatically captures 8-day

moving window baseline for week-to-week comparisons (default)

time

MetricUnits

Actual

AWR Baseline

8:00 12:00

Manage by Exception with Adaptive Metric Thresholds

Adaptive threshold values follow baseline values

AWR Baseline

Top 3 DBA Activities

• Performance Management• Challenge: Sustain Optimal Performance• Solution: Self-Managing DatabaseChange Management

Challenge: Preserve Order amid Change• Ongoing Administration

• Challenge: Manage More with Less

Lifecycle of Change Management

Make Change

Set Up TestEnvironments

Test

Diagnose & Resolve Problems

Preserve Order Amid Change

Identify Patches & Workarounds

Diagnose & Manage Problems

Provision for Production

Lifecycle of Change Management

Make Change

Set Up TestEnvironments

Test

Diagnose & Resolve Problems

Identify Patches & Workarounds

Diagnose & Manage Problems

Provision for Production

Real Application Testing

……

ClientClient

…Client

Capture DB Workload

Real Application Testing with Database Replay

• Recreate actual production database workload in test environment• Capture workload in production including critical concurrency • Replay workload in test with production timing• Analyze & fix issues before production

Middle Tier

Storage

Oracle DB

Replay DB Workload

Production Test

Test migration to RAC

0

20

40

60

80

Tim

e T

aken

(D

ays)

Install & Setup UnderstandApplication

Usage

Identify KeyTransactions

GenerateWorkload

Run Test

DB Replay

LoadRunner2

205

4

80

24 20

DB Replay: ½ month

LoadRunner: 7 ½ months

Total Testing Time

500

Comparison of LoadRunner & DB ReplayTesting e-Business Suite

Database Replay Comparison

Test Effort

Test Coverage

Workload

Database Time MachineTechnology that can only be built by Oracle

1-5% of workflow

Artificial simulated workload

3rd PartyLoad Testing Tools

•Simple app: weeks•Complex app:months

•Simple app: days•Complex app: days

Real application workload

Oracle Database Replay

100% of workflow

……

ClientClient

…Client

Capture SQL

• Test impact of change on SQL query performance• Capture SQL workload in production including statistics & bind variables• Re-execute SQL queries in test environment• Tune regressed SQL and seed SQL plans for production

Middle Tier

Storage

Oracle DB

Re-execute SQL Queries

Production Test

Use SQL Tuning Advisor to tune regression

Real Application Testing with SQL Performance Analyzer (SPA)

SQL Performance Analyzer (SPA)Comparison

NoYes, integrated with SQL Tuning Advisor & SQL

Plan Management

Transfer resolutions to

production

No, not integrated with optimizer

YesTest with production context

No, require explicit polling & external

storage

YesCapture with low overhead

3rd PartySQL Testing Tools

Oracle SPA

Technology that can only be built by Oracle

Lifecycle of Change Management

Make Change

Set Up TestEnvironments

Test

Diagnose & Resolve Problems

Identify Patches & Workarounds

Diagnose & Manage Problems

Provision for Production

Provisioning Automation

Reliable Deployment with Provisioning Automation

• Gold image based provisioning

New in 10gR3 Grid Control:• Greatly simplify RAC

provisioning with automation• Single click RAC scale-out

and scale-back• Provision full RAC and

Clusterware systems • Configures entire stack• Pre-requisite checks &

automatic fix-ups

Stage Gold Image

Create Production RAC System

2

3

11

Create reference RAC System

Scale-out RAC

4

SQL Plan Management

• Allow SQL plan changes, but only for the better !• Optimizer selects a new plan only after verifying it performs

better• All new plans are automatically or manually verified by test

executing them• Better performance verified plans are stored in SQL Plan

Baseline• Using SQL Performance Analyzer (SPA) to pre-seed baseline

with good plans for critical SQLs before making changes

SQL Plan Management is Controlled Plan Evolution

Automatic Diagnostic WorkflowAutomatic Diagnostic Repository

Duplicate Bug?

Yes

EM Support Workbench:Apply Patch or WorkaroundRepair Advisors

No

EM Support Workbench:Package Incident &

Configuration InformationRepair Advisors

Auto Incident CreationFirst-Failure Capture

Critical Error

Alert DBATargeted Health Checks

1 2

Reduce Time to Problem Resolution

34

Reliable Deployment with Patch Automation

• Proactive patch advisories from Oracle Metalink

• Acquisition of the patch based on installation’s configurations and feature usage (new in 11g DB)

• Stage once in the software library for multiple deployments

• Best practice driven patching• Rolling patching support for

RAC/ASM/Clusterware (new in 10gR3 Grid Control)

1-off patch becomes available

Yes

Apply patch

Proactively search for patches relevant

to customer environment

Alert DBADownload Patch

Relevant Patch

Found?

Online Patching

• Patch a running Oracle instance with no downtime• Many one-off patches can be online patched

• Subset of RAC online upgradeable patches• Great for diagnostic patches

• Enable, disable and de-install one-off patches with no downtime• Integrated with OPatch and inventory

• Initially available on Linux and Solaris• Long term goal is online patching of Critical

Patch Updates (CPUs).

Top 3 DBA Activities

• Performance Management• Challenge: Sustain Optimal Performance• Solution: Self-Managing Database

• Change Management• Challenge: Preserve Order amid Change• Solution: Realistic Testing & Provisioning

AutomationOngoing Administration

Challenge: Manage More with Less

• Management by Exception– Automatic notifications on

violations – Proactive security and policy

evaluations– Standardized IT operations

management• Manage Many as One

– Dashboard views– Monitoring templates– Combine targets into Groups and

Systems– Apply tasks and policies to Groups

and Systems

Manage More with Less usingGrid Control

Configuration Management Database (CMDB)

Software Installations

SW and HW Configurations

Resource Relationships

Certified Configurations

Best Practices

• CMDB reports• CMDB Statistics• Policy standards• Audit Reports• Decision support

for incident, problem, change, and release management

• Discover– Automated Inventory and Change

Tracking– All h/w & s/w configurations– Relationships– Oracle inventory, including patch

history and updates• Analyze

– Monitor and audit change– Configuration comparisons against

reference, saved or live • Foundation for compliance and

change control– Map to ITIL and CoBIT frameworks– Policy Management

• Standardize IT operations mgt• Security configuration policies

• Support Service: Oracle Configuration Support Manager

• Faster problem resolution

Manage More with Less usingGrid Control

Oracle Database 11g Solutions to Top DBA Challenges

• Performance Management• Challenge: Sustain Optimal Performance• Solution: Self-Managing Database

• Change Management• Challenge: Preserve Order amid Change• Solution: Real Application Testing & Provisioning Automation

• Ongoing Administration• Challenge: Manage More with Less• Solution: Grid Control