I am not saying Linux ate it. However I am suspecting KDE or Google Chrome might not be releasing it and I am not 100% sure that all the ram usage is being reported by “ps aux”. The other problem is that I have no idea which Ram figure the number in KDE represents as it doesn’t correspond to any of those figures.
That wasn’t a screenshot of a browser. Besides I have done that before and not found anything that goes as high as 9 Gi of Ram. The highest is an Ad Block Chrome extension which is just under 500,000K.
I don’t really understand the relationships myself: What part of memory is neither included in “used” nor in “available”? Probably just the same question phrased another way, but “free” plus “cache” tends to approximately equal “available” but “available” is a little smaller, why?
But I think your bigger question would be why is “used” as high as 3.1GiB doing “nothing”. I expect one of those nothings (first guess would be python) is a lot bigger than you think.
With Chrome gone, I expect the memory column in System Monitor is more helpful.
4.7 GiB ram used and 5.6% cpu usage seems to be doing a lot of “nothing”.
On my system, I consider it doing nothing when I first log in, have opened no tasks except possibly one terminal tab, and the CPU is showing 0% with memory considerably less than 4 GiB.
What does the command uptime show for load average?
My system is currently running at about 8% cpu, using 8GiB ram, 0 Swap, and has ~1250 processes loaded. These stats from lm_sensors and gkrellm.
My ‘uptime’ shows 1.28 load average
Given all the Chrome tabs I currently have open this looks reasonable. Before the update of Chrome I was getting as high as 16Gb ram usage so I am thinking it really was Google Chrome leaking memory that was the culprit.
I will highlight this as the solution if it keeps RAM under control in the next couple of days.