help | Serve course full times

PitaJ

@LEVI-HAVIV where is the server? What is it running on?

Given what you're seeing, my first action would be to back up everything and either wipe and reinstall everything on the server or just start up a new one and see if the issue continues to happen.

LEVI HAVIV

@PitaJ

ubuntu server,
Sitting on Contabo company

I have a lot more stuff on the server.

<baris>

How much memory does your server have? Did you set up swap? Sounds like you are running out of memory and then services are getting killed.

LEVI HAVIV

@baris

I have 200GB 8RAM
What is a swap?

<baris>

@LEVI-HAVIV https://www.digitalocean.com/community/tutorials/how-to-add-swap-space-on-ubuntu-20-04

LEVI HAVIV

@baris

<baris>

Yeah try setting up some swap see if it helps, without that if there is a spike in memory usage some processes can get killed by the oom killer.

LEVI HAVIV

@baris I added:

Swap: 1.0Gi 0B 1.0Gi
Is 1GB enough?

<baris>

Depends how high your usage gets during spikes you can monitor it and if it happens again double it.

PitaJ

If you have 200G of disc space, you can add a lot more swap. I'd do at least 8G assuming you have the space.

LEVI HAVIV

@PitaJ

At this moment he collapsed again.
I will expand the amount of GB to 8.
In any case, isn't it a bit suspicious the message when trying to connect to ssh?
kex_exchange_identification: Connection closed by remote host

Doesn't this mean that there is something on the server that disconnects me?
Or is it an expected error when the server exceeds its memory...

LEVI HAVIV

still not back

PitaJ

Connection closed by remote host is exactly what I'd expect from an OOM kill.

You're going to need to restart the server.

mschwartz

I would ssh in and run tmux and inside tmux something like top. I’d leave it open and see what happens.

With tmux, you can add a second pane with a shell. When the server isn’t responding, you can see if the shell responds. If not, and the top has stopped, your entire server has stopped.

I absolutely was unable to run NodeBB on an AWS Ubuntu instance with 8GB. Rebuilding from the admin control panel crushed the system to the point the build would take hours (thanks to swapping).

A 16GB instance and the software (NodeBB) runs smoothly. Once built, the site would probably run in 8GB. If you are using redis, it is going to use some RAM. I’m using MongoDB and it uses CPU and RAM, too. I choose a 2 processor system, one for NodeBB, and one for MongoDB (basically) - I don’t have the programs pinned to a core or anything, but for sure the NodeBB process gets to run and the MongoDB one does too.

I did find some comments somewhere by googling that 8GB is problematic.

LEVI HAVIV

Oh, I didn't think so: (I connected in vnc)

What is the command to expand the swap file in GB?

josef

@mschwartz said in help | Serve course full times:

I absolutely was unable to run NodeBB on an AWS Ubuntu instance with 8GB. Rebuilding from the admin control panel crushed the system to the point the build would take hours (thanks to swapping).

Wow, you totally overdid it, that's a lot for nodebb

phenomlab

@LEVI-HAVIV This will probably help

Repeated application crashes? You might need a Swap file

Lower grade VPS instances, whilst cheap, do have the inherent issue in the fact that they only have 1Gb of RAM. In most cases, this is enough for relatively ...

Sudonix | A one-stop-shop for all your technology questions (sudonix.org)

LEVI HAVIV

@phenomlab
Nice, is there a way to expand GB to an existing file?

phenomlab

@LEVI-HAVIV Yes and no - you'd have to disable the swap and recreate it - see

Learn How to Create a Swap File in Ubuntu

Need to know how to increase swap space in Ubuntu? Guard yourself against out-of-memory errors and add swap space to your server today. ✓ Read more here!

Linode Guides & Tutorials (www.linode.com)

LEVI HAVIV

@phenomlab

I understand, by the way, isn't it an exaggeration that the server crashes all the time? I have 8GB on the server, in the article it is written about a 1GB VPS