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Red Hat Certified Specialist in Performance Tuning exam (EX442)

EDU Trainings s.r.o.

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The Red Hat Certified Specialist in Performance Tuning exam (EX442) tests your ability to use standard system tools to analyze the performance of Red Hat® Enterprise Linux® and its applications. The offering also validates the knowledge needed to use standard system tools and mechanisms to modify the behavior of the system and applications to improve performance. By passing this exam, you become a Red Hat Certified Specialist in Performance Tuning, which also counts toward becoming a Red Hat Certified Architect (RHCA).
 

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You should be able to perform the tasks listed below:
Use utilities to analyze system behavior

Use utilities such as vmstat, iostat, mpstat, sar, gnome-system-monitor, top, powertop, and others to analyze and report system and application behavior
Use utilities such as Performance Co-Pilot (PCP) to analyze system behaviour
Use utilities such as dmesg, dmidecode, and sosreport to profile system hardware configurations

Monitor and alter kernel behavior

Use /proc/sys, sysctl, and /sys to examine, modify, and set kernel run-time parameters
Configure kernel behavior by altering module parameters

Analyze system and application performance

Analyze system and application behavior using tools such as ps, top, and Valgrind
Configure systems to run SystemTap scripts
Use the eBPF family of tools (e.g. syscount, gethostlatency and others) to diagnose system and application behavior
Given multiple versions of applications that perform the same or similar tasks, choose which version of the application to run on a system based on its observed performance characteristics

Tune running systems

Alter process priorities of both new and existing processes
Select and configure tuned profiles
Manage system resource usage using control groups

Tune memory utilization

Configure systems to support alternate page sizes for applications that use large amounts of memory

Configure disk and file subsystems

Select proper I/O scheduling algorithm
Tune file system layout for a given use

Tune network performance

Calculate network buffer sizes based on known quantities such as bandwidth and round-trip time
Set system buffer sizes based on those calculations

As with all Red Hat performance-based exams, configurations must persist after reboot without intervention.

Cieľová skupina

Experienced Linux system administrators responsible for maximizing resource utilization through performance tuning
A Red Hat Certified Engineer (RHCE) interested in becoming a Red Hat Certified Architect (RHCA).
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