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Optimizing Linux® Performance: A Hands-On Guide to Linux® Performance ToolsBy
Table of Contents
| Index
The first comprehensive, expert guide for end-to-end Linux
application optimization
Learn to choose the right toolsand use them together to
solve real problems in real production environmentsSuperior application performance is more crucial than
everand in today''s complex production environments, it''s
tougher to ensure, too. If you use Linux, you have extraordinary
advantages: complete source code access, plus an exceptional array
of optimization tools. But the tools are scattered across the
Internet. Many are poorly documented. And few experts know how to
use them together to solve real problems. Now, one of those experts
has written the definitive Linux tuning primer for every
professional: Optimizing Linux® Performance.Renowned Linux benchmarking specialist Phillip Ezolt introduces
each of today''s most important Linux optimization tools, showing
how they fit into a proven methodology for perfecting overall
application performance. Using realistic examples, Ezolt shows
developers how to pinpoint exact lines of source code that are
impacting performance. He teaches sysadmins and application
developers how to rapidly drill down to specific bottlenecks, so
they can implement solutions more quickly. You''ll discover how
to:
Identify bottlenecks even if you''re not familiar with the
underlying system
Find and choose the right performance tools for any
problem
Recognize the meaning of the events you''re measuring
Optimize system CPU, user CPU, memory, network I/O, and disk
I/Oand understand their interrelationships
Fix CPU-bound, latency-sensitive, and I/O-bound applications,
through case studies you can easily adapt to your own
environmentInstall and use oprofile, the advanced systemwide profiler for
Linux systemsIf you''re new to tuning, Ezolt gives you a clear and practical
introduction to all the principles and strategies you''ll need. If
you''re migrating to Linux, you''ll quickly master Linux equivalents
to the tools and techniques you already know. Whatever your
background or environment, this book can help you improve the
performance of all your Linux applicationsincreasing
business value and user satisfaction at the same time.
9.3. Optimizing an Application
When optimizing an application, several areas of the application's execution may present a problem. This section directs you to the proper section based on the problem that you are seeing.Figure 9-1 shows the steps that we will take to optimize the application.
Figure 9-1.
9.3.1. Is Memory Usage a Problem?
Use top or ps to determine Section 9.6.6; otherwise, continue to Section 9.3.2.
9.3.2. Is Startup Time a Problem?
If the amount of time that the application takes to start up is a problem, go to Section 9.3.3; otherwise, go to Section 9.3.4.
9.3.3. Is the Loader Introducing a Delay?
To test whether the Section 9.9. If it does not, continue on to Section 9.3.4.
9.3.4. Is CPU Usage (or Length of Time to Complete) a Problem?
Use top or ps to Section 9.5. If it is not a problem, go to Section 9.3.5.
9.3.5. Is the Application's Disk Usage a Problem?
If the application Section 9.7.3 to determine what files it is accessing. If not, go to Section 9.3.6.
9.3.6. Is the Application's Network Usage a Problem?
If the application Section 9.8.6.Otherwise, you have encountered an application performance issue that is not covered in this book. Go to Section 9.9.
