Hi All
I'm completely new to Unraid and I've recently set up a system with the following hardware

 

Intel® N100 @ 2871 MHz Motherboard from Ali Express

16gb Ram

Jonsbo N2

28tb (plus 10tb Parity)

1 nvme 250gb for all the docker apps

1 nvme 1tb for downloads

 

I'm running the usual dockers
overseerr

tautulli
sonarr
radarr (also a 4k version)
prowlarr

readarr
sabnzbd
readarr

mylar3

 

calibre
calibre-web

organizr

nginx-proxy-manager

 

 

I would also like to fire up Plex at some point (Currently it's running on a windows machine)

 

now my issue is regarding the below

is this level of system Ram Usage normal at 49%?

 

Ram Usage:  7.59GiB

Flash device: 670MiB

Log File: 37.7MiB

Docker Vdisk: 19.4GiB

 

I've looked over many different post and threads across Reddit and this Forum, yet I'm not able to get a clear answer,

as I'm wondering if I'm going to be able to run my plex server.

 

do I need to rethink my hardware set up, or am I completely missing something.

 

any help and advice would be really appreciated.

 

I've also attached my log files

 

the-box-diagnostics-20250204-1712.zip

you only have 16gb of ram, so what you are seeing is perfectly reasonable. Unraid will use as much ram as you throw at it, instead of your ram sitting unused all the time.

 

The official Plex container uses very little ram at idle, maybe 200-300mb for a large server, it will spike up to a couple of gigs under heavy load but you have ~8gb free so that is perfectly fine.

 

Definitely consider upgrading to 32gb in the future if you end up going over 80%-90% usage all the time though, you always want the system to have some free ram as it uses your "empty" ram for data caching in the background to speed things up.

 

Thank you

This is really helpful, I look into change the ram for a 64gb 

Hi, 

Sorry to come back to this. 

Viewing my system again this morning the system ram has increased by a further 2gb, while the docker usage has remained unchanged. 

 

Is there any way of knowing what from the system is consuming so much Ram 

 

System now shows 7GiB

 

3 minutes ago, Phairplay said:

Hi, 

Sorry to come back to this. 

Viewing my system again this morning the system ram has increased by a further 2gb, while the docker usage has remained unchanged. 

 

Is there any way of knowing what from the system is consuming so much Ram 

 

System now shows 7GiB

 

Other than looking using the 'ps' command to look for particular processes consuming a lot of RAM not really.   It is normal for Linux based systems (such as Unraid) to use any spare RAM for dynamic buffering, but that can be released if needed for other purposes.

Hey I understand that it's just odd to see it increase so quickly

I've found a command htop and looked at the high users and I see a lot of line stating 

 

/user/lib/sonarr/bin/sonarr =nobrowser - data/config

 

Same for radarr, prowlarr all with memory usage against them. That can't be correct can it? 

I would hold off on adding any more RAM for now. As you may know RAM isn't just consumed by processes that need it, but is also used for caching (which will be released when needed), from the OS's point of view, "unused RAM is useless RAM" it's just a matter of how it's allocated. Here is a graph from my 64 GB system:

 

 

As you can see about 40 of 64 GB of the RAM is in use but the vast majority is cache. If you want to see a graph like this on your system, install the "Dynamix System Statistics" plugin.

Hi I appreciate that unraid will use Unused ram but the increases wasn't sitting right with me. 

 

The amount used by the dockers remained unchanged, yet the unraid System usage was increasing way too quickly. 

 

So I may have found the issue. I run HA on a RPI and I found a intergration that connects to unraid via ssh.

It seems to be creating new connection every minute. So I removed the integration, rebooted unraid and my System usage is roughly 1.7GiB. 

Edited February 5, 20251 yr by Phairplay

Your use is normal.

 

I have all this running with lots leftover. 

hi @Paul_Ber

with all that running your System ram shows 3.67GiB, yet as you see from my above post my System usage increased to over 7GiB (hitting 10GiB before shutting down SSH)

24hrs after removing ssh access, my System usage has stabilized to around 1.2GiB.

Edited February 6, 20251 yr by Phairplay

4 hours ago, Phairplay said:

hi @Paul_Ber

with all that running your System ram shows 3.67GiB, yet as you see from my above post my System usage increased to over 7GiB (hitting 10GiB before shutting down SSH)

24hrs after removing ssh access, my System usage has stabilized to around 1.2GiB.

Have you actually ran out of RAM and system crashed?  If not, there is nothing to worry about. 

 

I do not know what else to say as I have always had systems with 32GB RAM.   Now I have 64GB RAM.

@Paul_Ber

I'm only taking about the segment of the entire ram wihich under the legend states System, my understanding is that is unraid itself. 

I noticed that unraid was increasing its usage really quickly for no apparent reason (IMO) going from 1.2GiB to almost 10gib, (I believe I prevented a crash). 

 

Understanding it wasn't to do with the dockers I moved my attention to the ssh connection, I shut it down reboot the server and for the past 24hrs the unraid usage stablized (between 1.2-1.5GiB)

 

So by process of elimination the ssh was the cause for the increase. 

 

My point regarding your picture confirmed to me something couldn't be right. Why would unraid grab hold of so much Ram, when my server isn't doing even a 10th of what your is. 

 

Recomfirming I'm talking about the segment under the legend called system (Unraid), not the entire system

Then you have something miss configured, something pointing to RAM instead of a share.  SSH shouldn't increase RAM usage.