Read e-book online Configuring and tuning databases on the Solaris platform PDF

By Allan N. Packer

ISBN-10: 0130834173

ISBN-13: 9780130834171

Utilizing this publication, database execs can dramatically enhance the functionality and cost-effectiveness of just about any database program operating at the SolarisA (R) platform. Solaris database optimization professional Allan Packer provides start-to-finish suggestions on optimizing all 4 top Solaris databases: Oracle, DB2, Sybase, and Informix. Configuring and Tuning Databases at the Solaris Platform brings jointly best-practice guidance for each point of database tuning on sunlight servers. Drawing on years of workmanship as a solar advisor, Packer provides distinctive ideas for info structure, CPU and reminiscence configuration, and approach sizing. He introduces a scientific, drill-down tracking technique designed to assist database pros determine and unravel method bottlenecks that inhibit database functionality. Packer demystifies database tuning through offering a brief primer that explains database structure, key database ideas, and the way to exploit key subsystems resembling question optimizers and buffer cache. He describes and reviews each one best database benchmark, delivering tips for utilizing benchmarks -- and never misusing them

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Extra info for Configuring and tuning databases on the Solaris platform

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Just as you can't subclass the String class (because we need to be able to trust in the behavior of a String object), you can't override many of the methods in the core class libraries. This can't-be-overridden restriction provides for safety and security, but you should use it with great caution. Preventing a subclass from overriding a method stifles many of the benefits of OO including extensibility through polymorphism. java:5: The method void showSample() declared in class SubClass cannot override the final method of the same signature declared in class SuperClass.

That still leaves a boatload of other modifiers you can use on member declarations. Two you're already familiar with—final and abstract—because we applied them to class declarations earlier in this chapter. But we still have to take a quick look at transient, synchronized, native, strictfp, and then a long look at the Big One—static. We'll look first at modifiers applied to methods, followed by a look at modifiers applied to instance variables. We'll wrap up this section with a look at how static works when applied to variables and methods.

Public abstract void showSample(); Notice that the abstract method ends with a semicolon instead of curly braces. It is illegal to have even a single abstract method in a class that is not explicitly declared abstract! indd 41 11/28/05 12:24:51 AM CertPrs8/Java 5 Cert. java:1: class IllegalClass must be declared abstract. It does not define void doIt() from class IllegalClass. public class IllegalClass{ 1 error You can, however, have an abstract class with no abstract methods. The following example will compile fine: public abstract class LegalClass{ void goodMethod() { // lots of real implementation code here } } In the preceding example, goodMethod() is not abstract.

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Configuring and tuning databases on the Solaris platform by Allan N. Packer

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