I note that you've moved quite a few OS iterations from CentOS 5 to RHEL
7. The kernel memory management is likely to be a bit different. You
might find that the extra RAM usage is simply taken up by kernel buffers
and cache, so isn't really "in use" in the traditional sense.
Is there any way to verify that this is indeed the case?
Memory management and monitoring is something I don't know much about -
I know just enough to know how little I know.
The "real" memory usage graph is seemingly a good indication of actual
RAM utilisation because it excludes buffers/caches. If you're concerned
about Xymon using too much RAM, to the point where it could affect your
server's performance or stability, then I'd recommend opening a >new
thread to discuss it.
It is indeed indicated in ?real? memory. I already did open a new (older)
thread, which didn?t get much attention, maybe 2 replies. The mailinglist
is almost dead, so I know it?s a longshot to get help.