On Thu, Feb 23, 2023 at 07:00:57PM +0000, Matthew Chae wrote: > Hi Roman, > > I'd like to get the peak memory usage recorded overall time, rather than at a certain time. > Plus, I expect that the systematical way might have better performance compared to userspace sampling. I'm not necessarily saying to do this in userspace, you can try add a new system-wide counter (new /proc/vmstat entry). Obviously, it might be easier to do this in userspace. My point is to do it on system level rather than cgroup level and record a bottom of free memory rather than the peak of used memory. > If I understand correctly, recording the bottom of available free memory might not be helpful for this. > Am I missing something? Why?