Course Contents

Linux Performance Monitoring & Tuning

Introduction about Performance monitoring in Linux

• Monitoring Processes using ps command

• Monitoring Processes using top command

• Monitoring memory usage

• Monitoring File System Usage

• GNOME System Monitor

• Practice Lab Session

• Overview Sysstat Package Utilities

• Lab - Iostat command

• Lab - mpstat command

• Lab - pidstat command

• Overview SAR

• Advantages of SAR

• Lab - SAR

• Scheduling tasks with Systemd timer

• Monitoring Systems using Cockpit

• Monitoring Systems using performance co-pilot

Familiar with various Commands to manage performance issues in Linux Servers

• top

• vmstat

• iostat

• free

• lsof

• tcpdump- Network Packet Analyzer

Following are the Linux performance statistics using sar command.

• Collective CPU usage

• Individual CPU statistics

• Memory used and available

• Swap space used and available

• Overall I/O activities of the system

• Individual device I/O activities

• Run queue and load average data

• Network statistics

• Report sar data from a specific time

Viewing Hardware Resources

• Viewing kernel messages using dmesg command

• Retrieving CPU Information

• Retrieving DMI Information - dmidecode

• Retrieving peripheral Information

• hwloc & lshw command

Configuring Kernel Tunables

• Proc File System

• Kernel Tunables

• Modifying Kernel Tunables

• Modify Kernel Tunables Using Sysctl Command

• Modify Kernel Tunables Persistently

• Sysfs File System

• About Kernel Modules

• Practice Lab Session

• Overview about tuning profiles

• Managing profiles from the command line

• Lab Session - Tuning profile

Managing Resource Limits

• Limiting System Resources with ulimit

• Configuring Persistent ulimit Rules

• Practice Lab Session

• Setting Limits for Services

• Lab - Configure the service with a cgroup

Process Management

• Understanding ps commands with custom properties & Nice values etc

• Different stats of a process like "D", "S", "T", "Z" etc

• Kill commands to terminate the process

• Lab

Linux Find Commands

• Basic find commands for finding files with names

• Find files based on their permissions

• Search files based on owners & groups

• Find files and directories based on date & time

• Find files and directories based on size

Top Running Processes

• Command to list out top processes consuming highest memory utilization

• Command to list out top processes consuming highest cpu utilization

Lab on lsof - List open files & fuser

• lsof command used in many Linux/Unix like system that is used to display list of all the open files and the processes.

Lab on tcpdump- Network Packet Analyzer

• For example: number of packets received (transmitted) through the network card, statistics of packet failure etc

Practice Lab Sessions

• Practical Lab Session - High CPU Utilization

• Practical Lab Session - High Memory Utilization