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Server slow

Featured Replies

Hi,

 

i have the problem that my unraid server becomes really unresponsive from time to time.

The Processor view often shows all cores to be used by nearly 100%:

 

image.png.ab9db572d10dd66cda3b2f9779e9af37.png

 

But when i look into htop everything seems to be fine:

image.thumb.png.38722ef7e6c7414dbc21791e3a100a0c.png

 

I've ran Proxmox before on this server where i had no performance issues at all. Does anyone know what could cause this? Is it just caused by parity calculations? If thats the case, why can't i see them in htop or somewhere else?

 

My system currently:

OptiPlex 7070

Intel(R) Core(TM) i5-9500

32GB Ram DDR4

WD Blue SN570 2TB (Parity)

Crucial BX500 2 TB (Disk)

18 Docker containers

2 Users

 

Thank you

Solved by JorgeB

  • Community Expert

Does it return to normal if you stop docker?

  • Author

Seems like it does. I've deactivated docker now in Settings -> Docker.

After that the usage pretty much goes to zero. What could cause this?

 

grafik.png.168e6075162e8ed468048ce38d5e5408.png

  • Community Expert

Start the containers one by one to see if you can find the culprit.

  • Author

Okay, all containers are now stopped and i've started one of the smallest containers i have (homarr)

The Usage immediately jumps up to 50%. Just for a short time but multiply this by 18 and it makes sense that there is such a high usage.

But why is it like this? Under Proxmox with all containers enabled there were no performance issues at all.

image.png.cebf5bdc3a82ab2b796a87583f1d07ae.png

 

Even when i open the webpage of homarr in my browser i can see that there is a significant increase in usage in this graph.

  • Community Expert

If you are using /mnt/user paths try with disk shares, or use an exclusive share.

  • Author

I think i found the problem. I moved the docker directory to a dedicated pool drive. Now this is not part of the array anymore and it runs fine

  • Community Expert
  • Solution

Yeah, docker in the array will be super slow, docker on a pool can still be faster with disk or exclusive shares if you find it slow.

  • Author

What is the reason for this slowdown?

4 hours ago, rushing-mallet7748 said:

What is the reason for this slowdown?

Realtime parity calculation and updates for all writes.

  • Author

And why can't i see this in for example htop?

htop doesn't show iowait normally, the dashboard includes it.

  • Author

ok, thanks for the clarification

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