> I use a program called earlyoom, which has saved my server from having to have the big red button pushed quite a few times, when fumble-fingered PhD students

> I use a program called earlyoom, which has saved my server from having to have the big red button pushed quite a few times, when fumble-fingered PhD students "accidentally" consume all the RAM in their pet projects. Along those lines, take a look at this: [1] > Pressure stall information were added to Linux 4.20 as a way to quantify resource pressure in the system in a better way than the traditional load average. PSI aggregates and reports the overall wallclock time in which the tasks in a system (or cgroup) wait for cpu, io or memory. > This release [Linux 5.2] lets users to configure sensitive thresholds and use poll() and friends to be notified when a certain pressure thresold is breached within a user-defined time window. With this mechanism, Android can monitor for, and ward off, mounting memory shortages before they cause problems for the user. For example, using memory stall, monitors in userspace like the low memory killer daemon (lmkd) can detect mounting pressure and kill less important processes before device becomes visibly sluggish. In memory stress testing psi memory monitors produce roughly 10x less false positives compared to vmpressure. I haven't tried it yet, but it sounds promising. [1] https://kernelnewbies.org/Linux_5.2#Improved_Presure_Stall_Information_for_better_resource_monitoring https://kernelnewbies.org/Linux_5.2#Improved_Presure_Stall_I...