Download e-book for kindle: DB2 UDB V8 and WebSphere V5: Performance Tuning and by IBM Redbooks

By IBM Redbooks

ISBN-10: 0738498211

ISBN-13: 9780738498218

This Redbook discusses the built-in surroundings of DB2 UDB and WebSphere program Server (WAS), together with layout concerns, top practices, operation, tracking, and function tuning.

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Additional resources for DB2 UDB V8 and WebSphere V5: Performance Tuning and Operations Guide

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Therefore it is necessary to determine the maximum row size of the tables you want to 46 Chapter 3: Overview of DB2 UDB V8 Chapter 3: Overview of DB2 UDB V8 47 store in the table space to determine what page size fits it best. 4 Key performance-related areas In this section we provide a deeper view of the performance-related aspects of the DB2 UDB architecture. This will prepare you for Chapter 7, "Monitoring and tuning of DB2 UDB V8" on page 237, where we show you how to tune the database server.

Application client container Application clients are Java programs that typically run on a desktop computer with a graphical user interface (GUI). They have access to the full range of J2EE server-side components and services. The application client container handles Java application programs that access enterprise beans, Java Database Connectivity (JDBC), and message queues that belong to the Java Message Service (JMS). The J2EE application client program runs on client machines. This program follows the same Java programming model as other Java programs; however, the J2EE application client depends on the application client run time to configure its execution environment, and uses the Java Naming and Directory Interface (JNDI) name space to access resources.

But indexes also need space from your storage. What indexes need to be created depends on the SQL the application uses. We introduce a tool later in this chapter that helps you to determine which indexes may be useful. Type-2 indexes DB2 Version 8 adds support for type-2 indexes. Here are the main advantages of type-2 indexes: • They improve concurrency because the next_key locking is reduced to a minimum. Most next-key locking is eliminated by marking the key as having been deleted instead of physically removed the key from the index page.

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DB2 UDB V8 and WebSphere V5: Performance Tuning and Operations Guide by IBM Redbooks

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