Hi,

 

I have unraid with few VMs and my problem is I often have out of memory and unraid killed VM random.

 

System have 32GB ram and I have 3 VMs with 4GB ram and 2 VMs with 2GB ram. This is about 16GB ram. I used few docker, but memory usage is less then 1GB.

 

In htop

 

Remaining ram is cached, but I dont know why is out of memory when system have 15GB RAM cached.

 

I used latest stable unraid release 6.11.5

 

Use Plex?

Yes I use plex docker. But I can see dont use a lot of memory. 186mb is used.

 

Plex can suck up a lot of RAM when doing its maintenance (very quickly), so best to limit all dockers to an amount well below your total free

Edited January 11, 20233 yr by Michael_P

Are you sing the ZFS plugin? ARC can use a lot of RAM if not limited, and it can be slow to release it when needed.

9 minutes ago, Michael_P said:

Plex can suck up a lot of RAM when doing its maintenance (very quickly), so best to limit all dockers to an amount well below your total free

My free memory is only 300mb. I use 16GB all other ram i cached. What is recommendation to limit docker? Can yout tell me how to limit docker? I never limit docker, i dont see this options. Tnx

8 minutes ago, JorgeB said:

Are you sing the ZFS plugin? ARC can use a lot of RAM if not limited, and it can be slow to release it when needed.

No I dont use ZFS plugin.

2 minutes ago, Kristijan said:

My free memory is only 300mb. I use 16GB all other ram i cached. What is recommendation to limit docker? Can yout tell me how to limit docker? I never limit docker, i dont see this options. Tnx

 

Extra parameters line (in advanced settings for the docker container) 

 

--memory=4G

 

That will limit the docker to 4GB before restarting the container (you can change to whatever you want to limit it to)

 

 

7 hours ago, Michael_P said:

 

Extra parameters line (in advanced settings for the docker container) 

 

--memory=4G

 

That will limit the docker to 4GB before restarting the container (you can change to whatever you want to limit it to)

 

 

But I dont have Extra parameters line. I must create or?

 

 

23 minutes ago, Kristijan said:

But I dont have Extra parameters line. I must create or?

 

You need to switch from basic to advanced view

 

 

 

Which will show you additional fields

 

 

Ok. Thank you. What do you recommend for plex limit? now usege is 180mb. Is 500mb limit ok?

I I have noticed in 3:40 something happens end unraid kill VM. How i can find what usage ram?

 

 

Now htop on unraid and gui dont show  same ram usage. Before 3:40 htop and gui show same usage.

 

Here is usage 14.2GB RAM

 

 

In GUI show 76%