2024-02-19, 03:18 PM
In your screenshots only ~2GB is ACTUALLY used/reserved. The rest is caching, which is normal. Unused memory is wasted memory and Linux will use a lot of memory for caching. Memory used for caching is easily released when another app needs it. A lot of UIs, like that Proxmox screenshot, do not differentiate between reserved memory (memory that is actually in use) and cache.