linux. Nothing is included, but 2 gigabytes of RAM is busy?

Question

linux

I noticed oddities in RAM, Linux itself is a light system, and it eats suspiciously a lot of RAM. System settings are stock. Linux Debian 11 Bullseye. Cinnamon. RAM 8 GB.

After a reboot, without opening anything:


After several days of laptop operation without reboots, the browser, etc. closed everything:


And also without reboots, just closed everything:



What are these strange things? Help

Answer 1

Never happened and here again www.linuxatemyram.ru still need to learn to google

Answer 2

what scares you? You have a shell running, system services...

Answer 3

I correctly understand the screenshot that out of 2 GB of occupied memory, 1.7 GB are used for cached data.
then everything is ok.
Linux has a habit of caching everything in memory.
does not interfere - it is cleared instantly.
here you go. out of 3 gigs, only 170 mb are free - almost all of the memory of the kagbe is crammed.
but 1.9 GB of the occupied is used for caches and buffers. and it is considered free to use.
875mb are directly used by services.

~$ free -h
             total    used    free    shared    buff/cache   available
Память:      2,9Gi    857Mi   170Mi   2,0Mi     1,9Gi        1,9Gi

Answer 4

Take something like Sway or i3wm they weigh lighter than any cinammon or somewhere