Book Image

IBM Db2 11.1 Certification Guide

By : Robert (Kent) Collins, Mohankumar Saraswatipura
Book Image

IBM Db2 11.1 Certification Guide

By: Robert (Kent) Collins, Mohankumar Saraswatipura

Overview of this book

IBM Db2 is a relational database management system (RDBMS) that helps you store, analyze, and retrieve data efficiently. This comprehensive book is designed to help you master all aspects of IBM Db2 database administration and prepare you to take and pass IBM's Certification Exams C2090-600. Building on years of extensive experience, the authors take you through all areas covered by the test. The book delves deep into each certification topic: Db2 server management, physical design, business rules implementation, activity monitoring, utilities, high availability, and security. IBM Db2 11.1 Certification Guide provides you with more than 150 practice questions and answers, simulating real certification examination questions. Each chapter includes an extensive set of practice questions along with carefully explained answers. This book will not just prepare you for the C2090-600 exam but also help you troubleshoot day-to-day database administration challenges.
Table of Contents (10 chapters)

Transactions and logging parameters

A transaction is a sequence of one or more SQL statements grouped together as a single unit, typically within an application process.

The commands used to complete or end the transaction are as follows:

  • COMMIT
  • ROLLBACK

Transaction logging is a process to keep track of changes made to a database (by one or more application connections or transactions) as they are made. These changes are recorded in the transaction logs for replay purposes. The following section describes the database configuration parameters related to transaction logging:

  • logbufsz: This parameter specifies the amount of memory to use as a buffer for log records before writing these records to disk. The default value is 256 pages, however the Db2 configuration advisor will generally set the size to 2,151 pages (4 K page size).
  • logfilsiz: This parameter specifies the size of...