RedHat EX442 : Red Hat Certified Specialist in Linux Performance Tuning exam

EX442 real exams

Exam Code: EX442

Exam Name: Red Hat Certified Specialist in Linux Performance Tuning exam

Updated: Sep 17, 2026

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RedHat EX442 Exam Syllabus Topics:

SectionObjectives
System Profiling and Kernel Tuning- Performance profiling tools
  • 1. perf and sar usage
    • 2. Tracing system calls
      - Kernel parameter tuning
      • 1. sysctl configuration
        • 2. cgroups resource management
          System Performance Analysis- System resource monitoring and bottleneck identification
          • 1. Memory usage and swap behavior analysis
            • 2. CPU utilization analysis using standard Linux tools
              - Performance baseline establishment
              • 1. Interpreting system load averages
                • 2. Using historical metrics to identify degradation
                  Disk I/O Performance- Filesystem tuning
                  • 1. Disk scheduler configuration
                    • 2. Mount options optimization
                      - Storage performance analysis
                      • 1. iostat and iotop usage
                        • 2. Identifying I/O bottlenecks
                          CPU and Process Tuning- CPU performance optimization
                          • 1. Identifying CPU-bound processes
                            • 2. Load balancing across cores
                              - Process scheduling and prioritization
                              • 1. nice and renice usage
                                • 2. CPU affinity and taskset configuration
                                  Network Performance Tuning- Network throughput optimization
                                  • 1. TCP tuning parameters
                                    • 2. Bandwidth and latency analysis
                                      - Network troubleshooting tools
                                      • 1. Packet analysis basics
                                        • 2. ss, netstat, and ip tools usage
                                          Memory Management- Virtual memory tuning
                                          • 1. Swap usage optimization
                                            • 2. Kernel memory parameters tuning
                                              - Memory leak detection
                                              • 1. OOM killer behavior analysis
                                                • 2. Process memory profiling

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