I read about PSS (Proportional Set Size), it’s the number of non-shared pages used by the application and even distribution of the shared pages. I thought it’s for shared libraries. To verify i wrote a hello world program and compiled with –static and i see PSS value more than dynamic value

$ gcc hello.c -o hello --static
Rss:                 808 kB
Pss:                 804 kB

$ gcc hello.c -o hello
Rss:                1420 kB
Pss:                 103 kB

Why is Rss less for static application and Pss more?