EX442 Practice Exam Lab

2 hours
  • 4 Learning Objectives

About this Hands-on Lab

This hands-on lab is built around the objectives identified by Red Hat for the `Red Hat Certified Specialist in Performance Tuning (EX442)` exam. The EX442 exam is a practical, scenario-based exam. This lab is not an exact copy of the exam; it is designed to provide possible tasks and situations that you might encounter when taking the exam.

The lab will have a 4-hour time limit, matching the actual `EX442` exam duration, and will serve as a summary of the some of the lessons and materials covered during this course.

Good luck with your studies!

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Review and Investigate the evocortl Service
  1. Check the status of the evocortl service.
    • If the service is not running, start the service.
  2. Investigate relevant log files, including journalctl and /var/log/messages.
  3. Correct any issues identified during the troubleshooting process.
    • Note: This service should be optimized to limit memory impact to 1000M.
Review and Investigate the evocordd Service
  1. Check the status of the evocordd service.
    • If the service is not running, start the service.
  2. Investigate relevant log files, including journalctl and /var/log/messages.
  3. Correct any issues identified during the troubleshooting process.
    • Note: This service should be optimized to limit CPU impact to 20% utilization.
Review and Investigate the evocordatlg Service
  1. Check the status of the evocordatlg service.
    • If the service is not running, start the service.
  2. Investigate relevant log files, including journalctl and /var/log/messages.
  3. Correct any issues identified during the troubleshooting process.
    • Note: This service does not have a hard optimization requirement but does have a recommended requirement, so be sure to investigate properly.
Reboot the Lab and Confirm Changes Persist
  1. Run the /home/cloud_user/examvalidation.sh to audit the system.
    • NOTE: The script must be executed with elevated privileges.
  2. Review the script output.
    • If any Status items are marked as REVIEW, review the details closely.
    • NOTE: There are several ways that issues could be resolved, so it is possible that your solutions may not be audited by the script. In this situation, manually review the configurations to ensure everything is operating and optimized to meet system requirements.

Additional Resources

SCENARIO:

You are a Linux System Administrator working for a software development company. One of the new production servers is not working properly. You have been tasked to investigate and troubleshoot the server and take any corrective action to resolve the issues. After investigation, you have identified several potential issues related to a core kernel module as well as the companies core application suite of services.

What are Hands-on Labs

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

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