Just for completeness sake, taken from the duplicate of this thread (https://forums.suse.com/showthread.p...no-process-!):

Quote Originally Posted by mpibgc View Post
You are right,

doing a "sync; echo 3 > /proc/sys/vm/drop_caches" solved the "problem".

I'll have to execute it on all idle nodes, so that the memory values are shown correctly for
the queueing system.

Thanks, Peer