> Also, I feel like the number of devs out there who understand that mmap'd files — including binaries/libraries — are basically mini-swap files when memory pre

> Also, I feel like the number of devs out there who understand that mmap'd files — including binaries/libraries — are basically mini-swap files when memory pressure is high is really low; more than once I've diagnosed a machine as "page thrashing" to get back "what? but it has no swap that cannot be?". This is also one of the reasons that putting swap on a different physical drive than /usr and /bin can help a lot. Once you hit memory pressure, I/O caching is going to disappear at the same time as your I/O is saturated doing swap. Just being able to read /usr/bin/ssh from a different drive than the one swap is thrashing can be night and day.