I tried to understand the situatiion using "top" & c., but I can't find a logical answer (for me).
Top always give something like:
top - 22:26:52 up 20 days, 21:38, 7 users, load average: 0.79, 0.75, 1.02
Tasks: 257 total, 1 running, 255 sleeping, 0 stopped, 1 zombie
%Cpu(s): 0.6 us...