Question Is there a way to restart the server automatically every time it crashes due to 2GB of RAM?

[Carlos Nog]

Server operating system version

Ubuntu 22.05

Plesk version and microupdate number

18.0.56

hello,

Is there a way to restart the server automatically every time it crashes due to 2GB of RAM?

 

[Dave W]

Its not Plesk that is crashing its your server running out of ram. Fix the RAM issue.

 

[Maarten]

What @Dave W is true, but if you need something, this might help:

- Log in on your server using SSH
- Add these two lines to /etc/sysctl.conf

vm.panic_on_oom=1   ; enables panic on OOM
kernel.panic=10     ; tells the kernel to reboot ten seconds after panicking

When your server runs out of RAM, the server will reboot after 10 seconds.
I haven't tested this, so use it with care.

 

[Dave W]

Plesk Watchdog might be better than rebooting tho?

But either way eventually you will just corrupt data.

 

[Carlos Nog]

I have 5 wordpress sites. And yesterday without having opened the plesk panel and without having been working on the wordpress sites, the server went down.
They have very little traffic.
2GB RAM
80GB SSD

 

[Maarten]

Did you check the /var/log/syslog after the reboot? Was there anything related to a system crash like "oom" (Out Of Memory)?
Could it be a fail2ban action that blocked you from the server?

I'm just curious why you think the server ran out of memory or crashed.

 

[afuego]

@Carlos Nog have you tried Increase Virtual Memory size

​

 

[Carlos Nog]

@afuego
This is what they told me about increasing

Question - Server Error 500 Plesk\Exception\Database

help me please. I sent the capture there.

talk.plesk.com

 

[Carlos Nog]

1. Would swap be recommended?
2. Rebooting the server damages the website?

 

[afuego]

Hi Carlos, what Peter Debik says resonates with what I heard from Plesk Technical Support recommendations.

I did have a similar experience, server running out of memory, and I added swap and it seems to help my situation.

 

[Carlos Nog]

Hi Carlos, what Peter Debik says resonates with what I heard from Plesk Technical Support recommendations.

I did have a similar experience, server running out of memory, and I added swap and it seems to help my situation.
View attachment 25104

hello. I have Ubuntu 22.04 and I want to add 4GB of RAM SWAP.

How did you do it? if you log in using ssh. but what commands did you use?

 

[afuego]

Hi Carlos, I logged to the server and executed the following commands, if use the SSH terminal on Plesk you could do it too.


Create a New Swap File (if needed):

• If you don't have an existing swap file, create one using fallocate:
  Bash
  sudo fallocate -l 4G /swapfile
  
  Use code with caution.
  • Replace 4G with the desired swap size (e.g., 8G for 8GB).

Set up the Swap File:

• Make the swap file usable with mkswap:
  
  sudo mkswap /swapfile
  
  
  
• Enable the swap file:
  
  sudo swapon /swapfile
  
  

Make the Change Permanent:

• Edit the /etc/fstab file to mount the swap file automatically at boot:
  
  sudo nano /etc/fstab
  
  
• Add this line to the end:
  /swapfile swap swap defaults 0 0
  

5. Adjust Swappiness (Optional):

• Control how often the system uses swap:
  
  sudo sysctl vm.swappiness=10
  
  
  • Values closer to 0 mean less frequent swap usage, while values closer to 100 mean more frequent use.

6. Verify the Changes:

• Use free -m again to confirm the increased swap space.

More information:

Why swap is required on Plesk for Linux servers? - Support Cases from Plesk Knowledge Base

Why swap is required on Plesk for Linux servers? - Support Cases - Plesk Knowledge Base

www.plesk.com

https://support.plesk.com/hc/en-us/articles/12388014939287-What-are-recommended-requirements-of-SWAP-RAM-and-Disk-space-for-Plesk-Onyx-

 

[mow]

What @Dave W is true, but if you need something, this might help:

- Log in on your server using SSH
- Add these two lines to /etc/sysctl.conf

vm.panic_on_oom=1   ; enables panic on OOM
kernel.panic=10     ; tells the kernel to reboot ten seconds after panicking

When your server runs out of RAM, the server will reboot after 10 seconds.
I haven't tested this, so use it with care.

This is probably a vserver, so would this even work?

 

[Carlos Nog]

Hi Carlos, I logged to the server and executed the following commands, if use the SSH terminal on Plesk you could do it too.


Create a New Swap File (if needed):

• If you don't have an existing swap file, create one using fallocate:
  Bash
  sudo fallocate -l 4G /swapfile
  
  Use code with caution.
  • Replace 4G with the desired swap size (e.g., 8G for 8GB).

Set up the Swap File:

• Make the swap file usable with mkswap:
  
  sudo mkswap /swapfile
  
  
  
• Enable the swap file:
  
  sudo swapon /swapfile
  

Make the Change Permanent:

• Edit the /etc/fstab file to mount the swap file automatically at boot:
  
  sudo nano /etc/fstab
  
  
• Add this line to the end:
  /swapfile swap swap defaults 0 0

5. Adjust Swappiness (Optional):

• Control how often the system uses swap:
  
  sudo sysctl vm.swappiness=10
  
  • Values closer to 0 mean less frequent swap usage, while values closer to 100 mean more frequent use.

6. Verify the Changes:

• Use free -m again to confirm the increased swap space.

More information:

Why swap is required on Plesk for Linux servers? - Support Cases from Plesk Knowledge Base

Why swap is required on Plesk for Linux servers? - Support Cases - Plesk Knowledge Base

www.plesk.com

https://support.plesk.com/hc/en-us/articles/12388014939287-What-are-recommended-requirements-of-SWAP-RAM-and-Disk-space-for-Plesk-Onyx-

Hello, thank you for your great help. I have done everything as you explained. I hope it works well for me now. I sent a screenshot there. Thank you