Book Image

Red Hat Enterprise Linux Server Cookbook

By : Jakub Gaj, William Leemans
Book Image

Red Hat Enterprise Linux Server Cookbook

By: Jakub Gaj, William Leemans

Overview of this book

Dominating the server market, the Red Hat Enterprise Linux operating system gives you the support you need to modernize your infrastructure and boost your organization’s efficiency. Combining both stability and flexibility, RHEL helps you meet the challenges of today and adapt to the demands of tomorrow. This practical Cookbook guide will help you get to grips with RHEL 7 Server and automating its installation. Designed to provide targeted assistance through hands-on recipe guidance, it will introduce you to everything you need to know about KVM guests and deploying multiple standardized RHEL systems effortlessly. Get practical reference advice that will make complex networks setups look like child’s play, and dive into in-depth coverage of configuring a RHEL system. Also including full recipe coverage of how to set up, configuring, and troubleshoot SELinux, you’ll also discover how secure your operating system, as well as how to monitor it.
Table of Contents (17 chapters)
Red Hat Enterprise Linux Server Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Monitoring CPU performance


This recipe will show you how to visualize using pmchart and command-line tools to monitor your CPU's performance. We will have a look at the following metrics:

  • kernel.all.cpu.wait.total

  • kernel.all.cpu.irq.hard

  • kernel.all.cpu.irq.soft

  • kernel.all.cpu.steal

  • kernel.all.cpu.sys

  • kernel.all.cpu.user

  • kernel.all.cpu.nice

  • kernel.all.cpu.idle

How to do it…

This will show you how to create the text and graphical representation of performance data. Perform the following steps:

  1. Display live data for the preceding metrics with a 1-second interval for the host, localhost. Execute the following command:

    ~]# pmdumptext -H -t 1 -i -l kernel.all.cpu.wait.total kernel.all.cpu.irq.hard kernel.all.cpu.irq.soft kernel.all.cpu.steal kernel.all.cpu.sys kernel.all.cpu.user kernel.all.cpu.nice kernel.all.cpu.idle -h localhost
    
  2. Create a configuration file for pmchart to display live data called cpu_stack.conf with the following contents:

    #kmchart
    version 1
    
    chart style stacking antialiasing...