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ArrayExpress Oracle DBA

Ahmet Oezcimen

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Agenda

1. Tasks2. System Overview

3. Oracle DB System

4. Database Monitoring

5. Database Security

6. Performance and Tuning

7. Backup and Recovery

8. Literature

9. Questions

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1. Tasks

Installation, configuration, upgrading and patching ofOracle software

Creation and maintenance databases and their objects

Establishment and maintenance backup and recoverypolicies and procedures

Implementation and maintenance database security

Performance and tuning of databases

Plan growth and changes (capacity planning)

Give consultation to development teams

Interface with Oracle Corporation for technical support.

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2. System OverviewBackup Server

(Legato Networker)

Backup Devices

Application Server

(Apache Tomcat v4.0.1)

Web Server

User

Oracle Database Server

(Oracle RDBMS 8.1.7.0.0)

JDBC

AEDEV

AETEST

AEPUB

AECUR

AEDWD

AECLONE

AEDWP

=ArrayExpress Development

=ArrayExpress Test

=ArrayExpress Public

=ArrayExpress Curation

=ArrayExpress Data Warehouse Development

=ArrayExpress Data Warehouse Public

=Copy of the ArrayExpress Public database

RMAN

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3. Oracle DB System

Oracle Software SQL*Plus

Svrmgrl

Exp/Imp

SQL*Loader

RMAN

Etc..

DB Structure

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3. Oracle DB System (continued) DB Structure

Instance Background Processes

DBWR = database writer

LGWR = log writer

PMON = process monitor

SMON = session monitor, etc.

System Global Area (SGA)

Database Buffer Cache

Shared Pool Area

Dictionary Cache

Library Cache

Redo Log Buffer

Processes User Process

Server Process

Database (Database Files, Database Objects)

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3. Oracle DB System (continued)

L

R

U

Dirty

System Global Area (SGA)

Database Buffer Cache

Shared Pool Area

Dictionary

Cache

Library

Cache

Redo

Log

Buffer

SMON

PMON

RECO

LCK0

DBWR CKPT LGWR ARC0

Redo Log FilesData Files Control Files

Dedicated

Server

Process

User

ProcessArchived

Redo Log

Files

Init

.ora

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4. Database Monitoring

All Instances are up

Any new alert log entries

Success of DB backup

Free space in tablespaces

User activities

Blocking processes

Invalid Objects

Objects that break rules

Fragmentation

Security Policy Violations, etc..

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5. Database Security

Access on DB

Username and Password

Profiles

Access on DB Objects

Roles Privileges

System Privileges

Object Privileges

Auditing- Statement Auditing- Privilege Auditing- Object Auditing

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40%

60%

6. Performance and Tuning

Application

Database60% ofdatabaseperformanceproblems are

caused byapplications

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6. Performance and Tuning (continued) Application Tuning

SQL Tuning

Database Tuning

Tuning Memory Usage

Tuning the Shared Pool Tuning the Data Buffer Cache

Tuning Redo Log Buffer

Tuning Disk Utilization

I/O Distribution

Detecting I/O Problems

Using Locally Managed Tablespaces

Tuning Rollback Segments

Tuning Sorts

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6. Performance and Tuning (continued)

Database Tuning

Other Tuning Issues

Table/Index Partitioning

Analyse Tables and Indexes

Reorganise tables

Rebuild indexes

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7. Backup and Recovery

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7. Backup and Recovery (continued)

Backup Why Backups?

Mistakes by

Hardware

Oracle

User, Programmer, DBA

Type of Backups

Physical Backup with or without RMAN

Online (Hot) Backup

Offline (Cold) Backup

Logical Backup Using Export

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7. Backup and Recovery (continued)

Recovery

Type of Recovery

Instance Recovery

Media Recovery

Recovery Methods

Recovery with Physical Backups

Recovery with Logical Backups Import

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8. Literature http://www.oracle.com/Oracle Company

http://otn.oracle.com/software/content.html OracleTechnology Network > Software

http://technet.oracle.com/The technical sites ofOracle

http://metalink.oracle.com/The Oracle Metalink http://education.oracle.com/The Oracle Company:

Education

http://www.oracle.com/download The Oracle

Company: Download Products

http://oracle-ftp.oracle.com/The Oracle Company:Patch Sets

http://industry.ebi.ac.uk/~ahmet/My Home page

http://www.oracle.com/http://otn.oracle.com/software/content.htmlhttp://technet.oracle.com/http://metalink.oracle.com/http://education.oracle.com/http://www.oracle.com/downloadhttp://oracle-ftp.oracle.com/http://www.oracle.com/downloadhttp://oracle-ftp.oracle.com/http://oracle-ftp.oracle.com/http://www.oracle.com/downloadhttp://oracle-ftp.oracle.com/http://oracle-ftp.oracle.com/http://oracle-ftp.oracle.com/http://www.oracle.com/downloadhttp://education.oracle.com/http://metalink.oracle.com/http://technet.oracle.com/http://otn.oracle.com/software/content.htmlhttp://www.oracle.com/

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