High disk usage in LVM-Thin

[Talha]

Hi,
Disk usage is 92% on a server with 100GB disk capacity, but I only use 27GB in the VM. Can someone help me please?

 

[fstrankowski]

You gotta enable discard in the VM disc mount options or run fstrim inside the VM to reclaim unused disc space.

 

[Talha]

You gotta enable discard in the VM disc mount options or run fstrim inside the VM to reclaim unused disc space.

View attachment 40882

Thanks. How can I do this for Linux Containers (CT)?

 

[fstrankowski]

Thanks. How can I do this for Linux Containers (CT)?

Oneliner to trim all containers:

pct list | awk '/^[0-9]/ {print $1}' | while read ct; do pct fstrim ${ct}; done

 

[Dunuin]

Just keep in mind that doing a "pct trim" will lock the LXC for a short time and then backup jobs will fail. I had to disable that oneliner in cron at hours when backup jobs are running.