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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.
7.3. Chapter Summary
This chapter provided information about how to use the Linux network performance tools to monitor the network traffic flowing through a system all the way from the low-level network interfaces to high-level applications. It introduced tools to query the current physical link settings (mii-tool, ethtool) and tools that monitor the amount and types of packets flowing through the low-level interfaces (ifconfig, ip, sar, gkrellm, iptraf, netstat, etherape). It then presented tools that display the different types of IP traffic (gkrellm, iptraf, netstat, etherape) and the amounts of each type of traffic (gkrellm, iptraf, etherape). This chapter then presented a tool (netstat) that maps the IP socket usage to the process that is receiving/sending each type of traffic. Finally, a network-visualization tool was presented that visualizes the relationship between the type and amount of data flowing through a network and which nodes it is flowing between (etherape).The next chapters describe some of the common Linux tools that make using performance tools easier. They are not performance tools themselves, but they make using the performance tools more palatable. They can also help to visualize and analyze the results of the tools, as well as automate some of the more repetitive tasks.
