RedHat Red Hat Certified Specialist in Linux Performance Tuning : EX442

EX442 real exams

Exam Code: EX442

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

Updated: Jul 26, 2026

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RedHat EX442 Exam Syllabus Topics:

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

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