>From https://www.kernel.org/doc/html/latest/filesystems/proc.html ``` The “proportional set size” (PSS) of a process is the count of pages it has in memory, where each page is divided by the number of processes sharing it. ``` The definition is a bit imprecise if a process uses multiple-mapping. A real example is ZGC in OpenJDK, as asked at https://superuser.com/questions/1485370/linux-misreports-process-size-with-heap-multi-mapping A more precise wording could be something like `..., where each page is divided by the number of mappings associated with it.` PS: I have read https://www.kernel.org/doc/html/latest/admin-guide/reporting-bugs.html, but it's still unclear to me whether a mail or a ticket in bugzilla is preferred. Since this is just a documentation issue, maybe a mail is fine. /Albert
