Book Image

Red Hat Enterprise Linux Server Cookbook

By : Jakub Gaj, Leemans
5 (1)
Book Image

Red Hat Enterprise Linux Server Cookbook

5 (1)
By: Jakub Gaj, 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 (12 chapters)
11
Index

Monitoring basic system performance


We need to keep an eye out on global system values. The ones that are particularly of interest are the following:

  • kernel.all.pswitch

  • kernel.all.nprocs

  • kernel.all.load

How to do it…

I'll show you a way to display both text-based and graphical output. Here are the steps:

  1. Display live data for the metrics with a 1-second interval for the guest.example.com host by executing the following command:

    ~]# pmdumptext -H -t 1 -i -l kernel.all.pswitch kernel.all.nprocs kernel.all.load -h guest.example.com
    
  2. Create a configuration file for pmchart to display live data called system.conf with the following contents:

    #kmchart
    version 1
    
    chart style plot antialiasing off
            
    plot color #ffff00 metric kernel.all.pswitch
    chart style plot antialiasing off
            plot color #ffff00 metric kernel.all.nprocs
    chart style plot antialiasing off
            plot color #ffff00 metric kernel.all.load instance "1 minute"
            plot color #ff924a metric kernel.all.load instance ...