db manageability good ocm

7/28/2019 DB Manageability GOOD OCM

1/291

11g Database Manageability

Memory Management

AWR Baselines

Automatic SQL Tuning

Advisors

Upgrade Considerations

Memory Management in 10g/11g

SGA_TARGET

Key shared memory componentstuned automatically

Single parameter controls allshared memory

10g Automatic Shared MemoryManagement (ASMM)

10g Automatic PGA MemoryManagement

PGA_AGGREGATE_TARGET

Various PGA sort areas tunedautomatically

Single parameter controls all PGAmemory

MEMORY_TARGET

MEMORY_MAX_TARGET

Improves memory utilization

Eases memory management

11g Automatic Memory Management


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Automatic Memory Management in 11g

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

Dynamic parameters for all databasememory:

0(025


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AWR Baseline and Adaptive Thresholds

Performance Monitoring and Baselines

Performance Page shows certain metrics against 99th

percentile over selected baseline

Adaptive Thresholds over select system metrics

Enabled by System Moving Window baseline

AWR Compare Period Report

Use Baseline as one of the periods


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Other Baselines Features

Baseline Templates enable future Baseline creation

Pre-specify known interesting times, e.g. Thanksgiving

System Moving Window Baseline

Always available

Defined by AWR retention or user specified

Adaptive thresholds computed over this baseline

Creating Single AWR Baseline


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Quick Configure Adaptive Thresholds

Adaptive Thresholds

Adaptive threshold valuesfollow baseline values

AWR Baseline


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Automatic SQL Tuning

Manual SQL Tuning Challenges

Complex - requires expertise in several domains SQL optimization: adjust the execution plan

Access design: provide fast data access

SQL design: use appropriate SQL constructs

Time consuming Each SQL statement is unique

Potentially large number of statements to tune

Never ending task SQL workload always evolving

Plan regressions can happen


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SQL Tuning in Oracle Database 10g

Workload

SQL Tuning Candidates

SQL Tuning

Advisor

ADDM

AWR

one hour

Generate

Recommendations

DBA

InvokeAdvisor

Implement

DBA

Some meaningful automation,but the DBA is still required

Evaluate

Recommendations

DBA

SQL Tuning Automation in 11g

Fully automatic SQL Tuning task

Runs automatically under Autotask framework:

Maintenance Window, CPU resource controlled, on/off switch

Identifies, ranks and tunes candidate SQL

Leverages SQL Tuning Advisor

Candidate SQL automatically chosen

Excluded: parallel queries, DML/DDL, recursive, ad-hoc (infrequent)

Tests and (optionally) implements SQL profiles

Only implements significantly improved plans (3x)

Time budgeted to avoid run-away plans


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Its Automatic!

ChooseCandidate

SQLone

week

Automatic SQL Tuning in OracleDatabase 11g

Workload

SQL TuningCandidates

Test SQL ProfilesImplement

SQL Profiles

Generate

Recommendations

AWRDBA

View Reports /ControlProcess

Result Summary


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Result Details

Result Recommendations


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SQL Access Advisor

SQL Access Advisor: Partition Advice

Indexes Materialized

views

Materialized

views log

SQL AccessAdvisor

Hypothetical

SQL cache

Filter

Options

STS

CompleteWorkload

Partitioned

objects

Hashpartitions?

Intervalpartitions?


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SQL Access Advisor Results

Access Advisor Recommendations


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Editable implementation script


Fault Diagnostic Automation


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Oracle Database 11g R1

Fault Diagnostic Automation

Realistic Testing

and

Automatic HealthChecks

Automatic

DiagnosticWorkflow

IntelligentResolution

Proactive

Patching

Goal: Reduce Time to Problem Resolution

Prevention Resolution

Diagnostic Solution Delivery

Automatic Diagnostic Workflow

DBA

CriticalError

AutomaticDiagnosticRepository

Known

bug?

DBA

EM Support Workbench:

Apply patch / Data Repair

Yes

DBA

No

Alert DBATargeted health checks

Assisted SR filling

Auto incident creation

First failure capture

EM Support Workbench:

Package incident info

Data Repair

1 2

3

4


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Problems and Incidents

Problems are fundamental code or configurationissues that can cause execution failures

They exist until they are corrected, e.g by patch

They are assigned a signature-based key value

An incident is a single occurrence of a problem

They happen at point(s) in time and thus have timestamps

They induce diagnostic actions like dumps and traces

They are managed by ADR and packaged by IPS

Automatic Diagnostic Repository

diag

rdbms

DBName

SID

ADRBase

$ORACLE_HOME/log

DIAGNOSTIC_DEST

ADRHome

$ORACLE_BASE

ADRCIlog.xml

alert_SID.log

V$DIAG_INFO

BACKGROUND_DUMP_DEST

USER_DUMP_DEST

CORE_DUMP_DEST

alert cdump (others)hmincpkg incident

metadata

incdir_1 incdir_ n

trace

Support Workbench


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Important points about ADR

Location of traces and dumps has changed See V$DIAG_INFO for new locations

Symbolic links can provide work around for scriptcompatibility

Format of alert.log is changed New XML format more parse-able

Old style still available for backward compatibility

Space management Incident flood control minimizes number of traces

ADR auto-purging reduces disk footprint

Incident Packaging Service (IPS)

IPS automates packaging of diagnostic data for given problem

Creates zip files from incident package contents for sending toOracle Support

Intelligently correlates and includes dumps and traces fromrelated incidents Correlation rules based on time proximity, client id, error code

Recommends further diagnostic actions for DBA For example build SQL test case

DBAs can explicitly add/edit or remove files before packaging

Including non-ADR managed files


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EM Support Workbench Overview

Primary customer-facing interface into IPS and ADR

Task-oriented interface over problems and incidents View problem and incident details

Create and manage IPS packages

Run health checks or generate additional diagnostic data

Run advisors to help resolve problems

Linkages to Oracle Support Generate and send incident package files using OCM

Create and track Metalink service requests from problem Close problem SR once resolved

EM Support Workbench


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Package details and IPS in EM

EM Support WorkbenchQuick Package

Simple wizard workflow from problem throughpackage and send to support

Single-problem package

Good for rapid first fault reporting

Limitations

Package zip must be 2GB or less

Cannot scrub traces or customize package


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Prevention: Health Monitoring

Proactive Health Checks

E.g. Dictionary Validation

Reactive Checks

Trigger on error via Intelligent dumping Rules

E.g. Checks blocks around corrupted block

All Checks can be Activated on Demand

Incident Meter for EM

Intelligent Repair Advisors

Data Recovery Advisor

Guided expert data recovery system using diagnostic dataand Health Check output

SQL Test Case Builder

Automatically retrieves exact environment information from

ADR to build SQL test cases and replicate SQL issues

SQL Repair Advisor

Analyzes failing SQL statements to isolate bug

May recommend SQL Patch as work around


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Data Recovery Advisor Oracle Database tool that automatically diagnoses data failures,

presents repair options, and executes repairs at the user's request

Determines failures based on symptoms

E.g. an open failed because datafiles f045.dbf and f003.dbf are missing

Failure Information recorded in diagnostic repository (ADR)

Flags problems before user discovers them, via automated health

monitoring

Intelligently determines recovery strategies

Aggregates failures for efficient recovery

Presents only feasible recovery options

Indicates any data loss for each option

Can automatically perform selected recovery steps

Reduces downtime by eliminating confusion


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Enterprise Manager Support



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Business Requirement Bug resolution

Test case required for fast bug resolution

Not always easy to provide a test case

What information should be provided?

How much data is need?

Getting the test case to Oracle can be tricky

Solution

Oracle automatically creates a test case

Collects necessary information relating to a SQL incident

Collected data is packaged to be sent to Oracle

Collected data allows a developer to reproduce the problem

SQL Repair Advisor


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SQL Repair Advisor

Business Requirementy The most common types of SQL problems - exception, performance

regression etc., are hard to diagnose

y A lot of time is spent trying to reproduce the problem

y If a workaround is found it has to be applied to entire system

Solution

Advisor

Investigates the incident locally

Automatically determines the root cause

Provides a workaround (SQL Patch) for just the effected SQL

If not, sends necessary diagnostic information to Oracle

SQL Repair Advisor Flow

DBA

SQLstatement Execute

Statementcrashes

Generateincident in ADRautomatically

DBA run

SQL Repair Advisor

DBA gets

alerted

SQ

LRepairAdvisor

investigates

SQL patchgenerated

DBA accept

SQL patch

Statementexecutes

successfully

again

SQL statementpatched

Execute

Trace files


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DB Management Pack Enhancements

Diagnostic Pack

ADDM for RAC

AWR Baselines and Adaptive Thresholds

Transportable AWR

Tuning Pack

Automatic SQL Tuning Advisor

Partition Advisor

Real-time SQL Monitoring

SQL Plan Management and Plan Evolution

Upgrade Considerations


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New Background Processes in 11g

ASMMaintains disk membership in ASM disk groupsGMON

ALL.The process archives historical rows for tracked tables into flashback data archives and manages the

flashback archives.FBDA

ALL with anyregistered event

activity

(optional non-fatal)

The Event Monitor Coordinator coordinates the event management and notification activity i n the

database which includes Streams Event Notifications, Continuous Query Notifications and FastApplication Notifications.

EMNC / e0xx

ALLPerforms diagnostic dumps and executes global oradebug commands.

DIAG

ALLResponsible for hang detection and deadlock resolution.

DIA0

ALLThe Resource Manager process is responsible for setting Resource Plans and other Resource Manager

related tasks.DBRM

RAC

In an RAC environment, this per-instance process (Atomic Controlfile to Memory Service) is an agentwhich contributes to ensuring a distributed SGA memory update is either globally committed on success

or globally aborted in the event of a f ailure.ACMS

RAC onlyProvides transparent support for XA global transactions in a RAC environment. The database

autotunest he number of these processes based on the workload of XA global transactions.GTX0-j

Description FoundProcess

Name

New Background Processes in 11g

RAC onlyThe RAC Management Processes perform manageability tasks for RAC, e.g. creation of RAC related

resources when new instances are added to the clustersRMSn

RAC onlyIn a RACenvironment, this process manages background slave process creation and communication onremote instances. These background slave processes perform tasks on behalf of a coordinating process

running in another instance.

RMSN

ALLThe Virtual Keeper of TiMe

?is responsible for providing a Wall-Clock time (updated every second) and

Reference-Time Counter (updated every 20ms and available only when running at elevated priority).VKTM

ALL (optional non-fatal)

The space management coordinator process coordinates the execution of various space managementrelated tasks, such as proactive space allocation and space reclamation. It dynamically spawns slave

processes (Wnnn) to implement the task.SMCO / Wnnn

ASM, spawned on

demand.Marks ASM Allocation Units as stale following a mi ssed write to an offline disk.MARK

ASM, spawned ondemand.

Performs proxy I/O to an ASM metafile when a disk becomes offline.KATE

Spawns Oracle processes.

Description

ALLPSP0

FoundProcess

Name


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Oracle Database 11g Release 1Upgrade Paths

Direct upgrade to 11g is supported from 9.2.0.4 or higher,10.1.0.2 or higher, and 10.2.0.1 or higher.

If you are not at one of these versions you need to perform adouble-hop upgrade

For example:

7.3.4 -> 9.2.0.8 -> 11.1

8.1.7.4->9.2.0.8->11.1

Choose an Upgrade Method

Database Upgrade Assistant (DBUA)

Automated GUI tool that interactively steps the user through

the upgrade process and configures the database to run withOracle Database 11g Release 1

Manual Upgrade

Use SQL*Plus to perform any necessary actions to preparefor the upgrade, run the upgrade scripts and analyze theupgrade results

Export-Import Use Data Pump or original Export/Import

CREATE TABLE AS SQL statement


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Oracle Database 11g InstallationChanges

Addition of new products to the install

SQL Developer

Movement of APEX from companion CD to main CD

Warehouse Builder (server-side pieces)

Oracle Configuration Management (OCM)

New Transparent Gateways

Removal of certain products and features from the installation:

OEM Java Console

Oracle Data Mining Scoring Engine

Oracle Workflow

iSQL*Plus

Fine Grained Access Control

for Utl_TCPand its cousinsChallenge

Oracle Database provides packaged APIs for PL/SQL

subprograms to access machines (specified by host and port)using bare TCP/IP and other protocols built on it (SMTP and

HTTP)

Utl_TCP, Utl_SMTP, Utl_HTTP

If you have Executeon the package, you can access ANYhost-port

Solution an Access Control List (ACL) specifies a set of users and roles

you assign an ACL to a host and port range

you may need to explicitly grant this access in 11.1


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Case Sensitive Password

By default:

Default password profile is enabled

Account is locked after 10 failed login attempts

In upgrade:

Passwords are case insensitive until changed

Passwords become case sensitive by ALTER USER

On creation:

Passwords are case sensitive

Review:

Scripts

Database links with stored passwords

Consider backward compatibility parameter,SEC_CASE_SENSITIVE_LOGON

Log files changes

Automatic Diagnostic Repository

$ORACLE_BASE/diag

alert.log

xml format

$ORACLE_BASE/diag/rdbms/orcl/orcl/alert/log.xml

adrci> show alert tail

RP: $ORACLE_BASE/diag/rdbms//trace/alert_SID.log


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Moving On

RBO

Still there, same behavior as 10.2, but even move

tools to ease the move

SQL performance analyzer

SQL plan management

Moving On

Stored Outline SQL Plan Management

Ultrasearch Secure Enterprise Search

CTXPath Index XML Index

SYSDBA for ASM administration

SYSASM

No longer supported

Workflow BPEL

These deprecated features / privileges are stillavailable for backward compatibility but therecommendation is to move on


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Oracle Client / Server InteroperabilityServer

Client11.1.0 10.2.0 10.1.0 9.2.0 9.0.1 8.1.7 8.1.6 8.1.5 8.0.6 8.0.5 7.3.4

11.1.0 Yes Yes Yes ES #5 No No No #3 No #3 No #3 No #3 No #3

10.2.0 Yes Yes Yes ES #5 No Was No #3 No #3 No #3 No #3 No #3

10.1.0(#4) Yes Yes Yes ES Was Was #2 No #3 No #3 No #3 No #3 No #3

9.2.0 ES #5 ES #5 ES ES Was Was No No Was No No #1

9.0.1 No No Was Was Was Was Was No Was No Was

8.1.7 No Was Was Was Was Was Was Was Was Was Was

8.1.6 No No No No Was Was Was Was Was Was Was

8.1.5No No No No No Was Was Was Was Was Was

8.0.6 No No No Was Was Was Was Was Was Was Was

8.0.5No No No No No Was Was Was Was Was Was

7.3.4 No No No Was Was Was Was Was Was Was Was

Metalink #207303.1: Client / Server / Interoperability Support Between Different Oracle Versions

Lifetime Support Policy

Metalink #454507.1: ALERT: Oracle 11g Release 1 (11.1) Support Status and Alerts

Metalink #454506.1: 11.1.0.6 Base Release - Availability and Known Issues

db manageability good ocm

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