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RedHat EX442 certification exam is a hands-on exam that requires candidates to perform tasks in a virtual environment. EX442 exam is four hours long and is conducted in a proctored environment. Candidates are required to complete a set of tasks within the given time frame and are evaluated based on their performance.

The EX442 certification exam is administered by Red Hat, a leading provider of open-source software solutions. EX442 exam consists of a performance-based assessment that evaluates the candidate's ability to analyze and optimize Linux system performance using a variety of tools and techniques. EX442 exam is conducted in a real-world environment, allowing candidates to demonstrate their skills in a practical setting.

Reference: https://www.redhat.com/en/services/training/ex442-red-hat-certified-specialist-in-linux-performance-tuning-exam

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RedHat EX442 Exam Syllabus Topics:

SectionObjectives
Analyze System and Application Performance- Analyze processes and applications
  • 1. Use Valgrind
  • 2. Use ps and top
- Trace and diagnose behavior
  • 1. Use eBPF tools
  • 2. Configure and use SystemTap
- Evaluate application performance
  • 1. Compare application implementations based on performance characteristics
Tune Running Systems- Control resource usage
  • 1. Manage control groups (cgroups)
- Manage process scheduling
  • 1. Modify process priorities
- Apply tuning profiles
  • 1. Configure and manage tuned profiles
Tune Memory Utilization- Analyze memory usage
  • 1. Identify memory bottlenecks
- Optimize memory performance
  • 1. Adjust memory-related settings
Tune Network Performance- Optimize network settings
  • 1. Tune network stack and configuration parameters
- Analyze network behavior
  • 1. Measure network throughput and latency
Use Utilities to Analyze System Behavior- Use Performance Co-Pilot
  • 1. Analyze system behavior with PCP
- Analyze and report system and application behavior
  • 1. Collect and interpret performance metrics
  • 2. Use vmstat, iostat, mpstat, sar, top, powertop, gnome-system-monitor and similar tools
- Profile hardware configurations
  • 1. Use dmesg
  • 2. Use sosreport
  • 3. Use dmidecode
Monitor and Alter Kernel Behavior- Manage kernel runtime parameters
  • 1. Use /sys
  • 2. Use sysctl
  • 3. Use /proc/sys
- Configure kernel modules
  • 1. Modify kernel module parameters
Configure Disk and File Subsystems- Tune storage subsystems
  • 1. Optimize file system and storage performance
- Analyze storage performance
  • 1. Evaluate disk I/O behavior

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