How can the sum of processes' CPU-% usage be lower than the total CPU load, according to atop
and top
, please?
I have a CPU reaching very high load (87%, for several hours) even though the sum of the individual processes as shown by atop
is muchs maller (~30%), please? See screenshot, recorded on a Synology DS218+ NAS. Same behaviour with top
and with Synology's resource monitor. I'm at a loss...
I would have expected the sum of the processes' load to equal the total load. Ideally I would have even seen a single process (or a few) going through the roof, and killed the culprit, but here I can't make sense of what I see...
Thanks for any idea!