#Kernel

RHEL Advanced #2: Kernel Tuning — sysctl, tuned, kdump

How to use sysctl to adjust kernel behavior at runtime, separating permanent settings into /etc/sysctl.d/, swapping workload profiles in one line with tuned, and capturing memory dumps at the moment of a kernel panic with kdump and analyzing them with crash — all in one cycle. Common keys like vm.swappiness and net.core.somaxconn, and the differences between tuned profiles, are covered together.