memory usage

[euri10]

greetings,

I'd rather open a discussion 1st rather than a bug report, hope it's fine.

I recently added to my home server a bunch of monitoring containers, the usual suspects (grafana, cadvisor, prometheus...) and after a few days, I'm wondering if the below looks normal.

This is the memory usage of my containers, on 03/19 at 12:00 approximately I restarted the rtorrent container, after I noticed it was using 23GB or ram.
You can notice that after the restart the memory increase usage over time looks quite linear, I also think he little bump on 03/20 around 20:00 is me downloading a file.

now the container cached memory is the same 👍

my rtorrent container runs ~ 1300 torrents, so I wondered if that memory usage made sense

[jesec]

I haven't encountered the issue. rTorrent runs perfectly fine for weeks on my old 8GB-RAM server. I seed around 7TB with that machine.

Note that cached memory is very different from used memory.

You should try to monitor the available memory of the entire system.

[euri10]

as a reference, how much ram does these 7TB "consume" on your system ?

I seed around 15TB, so I will try to cap the container memory with --memory and see if I run out of it

[jesec]

RSS: 103116 (approx. 100M)

Again, cached memory is very different from used memory.

Cached memory is free memory that has been filled with the contents of blocks on disk. It will be vacated as soon as the space is needed by anything else.

[euri10]

mouarf, TIL that displaying stats is way better when you know what they mean exactly !

so I did a ❯ docker stats --no-stream | grep rtorrent

which tells me I'm using 5.77GB on that container
82c4dfa9868c flood_rtorrent_1 0.86% 5.773GiB / 62.94GiB 9.17% 12.3GB / 55.7GB 156GB / 0B 3

the explanation of the difference is that cadvisor shows it differently (https://stackoverflow.com/questions/55117913/docker-stats-shows-different-data-compared-to-cadvisor)

long story short, seems like everything is fine, I use lot of ram, but most of it is cached, and I wasn't displaying the difference.

[jesec]

Good to know.

BTW: I actually seed approx. 12TB on that machine. I forgot to count a group.