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  • Book Overview & Buying PostgreSQL Administration Essentials
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PostgreSQL Administration Essentials

PostgreSQL Administration Essentials

By : Hans-Jürgen Schönig
3.1 (8)
Buy this Book
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PostgreSQL Administration Essentials

PostgreSQL Administration Essentials

3.1 (8)
By: Hans-Jürgen Schönig
Buy this Book

Overview of this book

If you are a database administrator who needs to get to grips with PostgreSQL quickly and efficiently, then this book is for you. This book will also be highly beneficial if you are a project leader or a developer who is interested in knowing more about database systems or bottleneck detection, as it will enable you to work more closely and cooperatively with your administrators.
Table of Contents (9 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Installing PostgreSQL
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1. Installing PostgreSQL
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Preparing your setup
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Understanding the existing databases
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Creating databases
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Summary
2
2. Indexing and Performance Tuning
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2. Indexing and Performance Tuning
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Using simple binary trees
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Understanding the concept of execution plans
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Dealing with different types of indexes
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Detecting missing indexes
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Detecting slow queries
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Adjusting memory parameters
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Summary
3
3. Users and Permissions
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3. Users and Permissions
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Understanding PostgreSQL security
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Summary
4
4. Managing Logfiles
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4. Managing Logfiles
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Understanding the PostgreSQL log architecture
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Configuring the amount of log output
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Making log creation more fine grained
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Summary
5
5. Backup and Recovery
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5. Backup and Recovery
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Importing and exporting data
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Performing backups
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Summary
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6. Handling Replication and Improving Performance
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6. Handling Replication and Improving Performance
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Understanding the PostgreSQL transaction log
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Configuring the checkpoints
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Setting up an asynchronous replication
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Upgrading to synchronous replication
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Improving and monitoring the replication
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Handling point-in-time recovery
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Understanding timelines
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Summary
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7. Monitoring PostgreSQL
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7. Monitoring PostgreSQL
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Understanding the system statistics of PostgreSQL
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Integrating Nagios
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Handling Linux cgroups
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Summary
8
Index
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Index

Understanding the PostgreSQL transaction log

Before digging into the world of replication, it makes sense to stop for a while and focus our attention on the PostgreSQL transaction log. Many people have heard about the transaction log but surprisingly few have understood the basic principles behind this highly important data structure which is capable of making PostgreSQL as robust as it is.

The purpose of the transaction log

In theory, the purpose of the PostgreSQL transaction log or Write Ahead Log (WAL) is pretty simple. It makes sure that a database instance survives crashes. In case the power goes out or the operating system crashes for some reason, the transaction log is always there to repair the system and to save system administrators from the disaster. So, why does a database instance need a repair in case of a crash anyway?

Well, let's assume a simple example. We got a table, say, of 10 GB and we want to add a simple row, as shown in the following code:

INSERT INTO foo VALUES ('abcdefg...
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PostgreSQL Administration Essentials
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