From vmstat, iostat, and PCP system analysis to kernel parameter tuning, eBPF and SystemTap profiling, tuned profiles, cgroups, huge pages, I/O scheduling, and network buffer optimisation — master every RHEL performance tuning skill in EX442.
From vmstat, iostat, PCP, and eBPF analysis to sysctl kernel tuning, tuned profiles, cgroup resource management, huge page memory, I/O scheduling, and network buffer optimisation — every EX442 objective covered.
Master system analysis with vmstat, iostat, mpstat, sar, PCP, and dmesg; kernel parameter tuning via sysctl and /proc/sys; process and application profiling with ps, top, Valgrind, eBPF tools (bpftrace, syscount), and SystemTap; process priority and tuned profile management; cgroup resource control; huge page configuration; I/O scheduling selection; and network buffer size calculation and configuration.
vmstat, iostat, mpstat, sar, PCP, powertop, dmesg, dmidecode, sosreport — system and hardware profiling tools.
Use /proc/sys, sysctl, and /sys to examine and set kernel runtime parameters; configure module parameters.
ps, top, Valgrind, SystemTap, eBPF (bpftrace, syscount, gethostlatency) — diagnose CPU, memory, I/O behavior.
Alter process nice/priority values, select and configure tuned profiles (latency-performance, throughput-performance), manage resource usage with cgroups v2, configure huge pages for high-memory apps, select I/O scheduling algorithm, tune filesystem layout, calculate and set network buffer sizes.
Configure systems to support alternate page sizes (huge pages) for applications that use large amounts of memory.
Calculate network buffer sizes based on bandwidth and RTT, set rmem_max/wmem_max system buffer sizes.
Performance-tuned RHEL systems underpin trading platforms, real-time databases, and telco network functions. EX442 certifies you have the deep tuning skills to squeeze maximum performance from enterprise RHEL infrastructure.
Banks, telcos, and high-frequency trading firms need Linux admins who can tune RHEL for maximum throughput and minimum latency. EX442 certifies those skills.
EX442 is a hands-on exam on a real RHEL system — you analyse performance, tune kernel parameters, and apply profiles under actual exam conditions.
RHEL performance specialists are among the highest-paid Linux engineers at telcos, banks, and data centre operators globally.
Our curriculum covers every EX442 objective — from vmstat and eBPF analysis to sysctl, tuned, cgroups, huge pages, I/O scheduling, and network buffers.
Practise on real RHEL 9 systems with all performance tools — every module includes hands-on profiling and tuning tasks aligned to exam objectives.
From system behavior analysis and kernel tuning to application profiling, running system tuning, memory, disk, and network performance optimisation.
Flexible pricing for live and blended training modes — we reply within 24 hours.
Linux performance tuning skills are in high demand at telcos, HFT firms, banks, and data centres where system performance is a strategic advantage.
Join performance engineers squeezing maximum throughput and minimum latency from RHEL — the skills telcos, banks, and data centres pay premium salaries for.