systemd journal and Linux kernel PSI integration: configuring useful alerts without notification noise
The goal is to set up alerts that fire when sustained memory, CPU or I/O pressure appears, using the pressure stall information (PSI) files exposed by the kernel and forwarded to the systemd journal, while avoiding alert noise from short‑lived spikes. PSI reports some, full and avg10 stall‑time fractions; choosing which metric to watch and what avg10 thresho