Low memory after streaming video from SMB USB

limbot · 2019-07-10T13:16:57.353Z

B1300 3.022

Streaming video from a USB key seems to reduce free memory to 1%.

Doesn’t drop back after stopping streaming.

Doesn’t seem to effect performance however (speedtest, streaming Netflix)

What’s causing this?

Can i free it up without rebooting?

Ideas, thoughts, comments?

image1720×959 60 KB

jeffsf · 2019-07-10T15:32:14.884Z

The Linux kernel and drivers tend to “cache” disk usage with available memory. The memory is reclaimed when a process needs it. This may be what you’re seeing.

From a completely different device that isn’t doing anything right now past running APs and routing, 20 MB are being used as “cache”, as an example

jeff@office:~$ free
              total        used        free      shared  buff/cache   available
Mem:         124500       25356       78104         312       21040       63892
Swap:             0           0           0