Proxmox Health

Just some useful commands for Proxmox Virtual Environment.

Watch system processes:

    bash
  
1
2

htop
top

Show disk usage:

    bash
  
1

pvesm status

Show root filesystem:

    bash
  
1

df -Th /

Check RAM:

    bash
  
1

watch -n 2 free -h

Enable memory overcommit vor Virtual Machines:

    bash
  
1

echo "vm.overcommit_memory=1" >> /etc/sysctl.conf

Check Swap:

    bash
  
1

cat /proc/swaps

Change swappiness:

    bash
  
1

echo "vm.swappiness=10" >> /etc/sysctl.conf

Check swappiness:

    bash
  
1

sysctl -p

Flushes swap usage and clears old RAM pages (without reboot)

    bash
  
1
2

swapoff -a
swapon -a

Shows all active swaps:

    bash
  
1

swapon --show

Start swap with priority:

    bash
  
1

swapon -p 100 /dev/zram0

Check for zram and load it with modprobe if not showing up:

    bash
  
1
2
3

ls /sys/block | grep zram
lsmod | grep zram
modprobe zram

Shows zram compression:

    bash
  
1

zramctl

Restart zram:

    bash
  
1

systemctl restart zramswap

Container config:

    bash
  
1
2

vi /etc/pve/lxc/<id>.conf
pct config <id> | grep <search for config>

Check for oom issues: e.g. killing a process because of low RAM

    bash
  
1

dmesg | grep -i oom

Set correct access privilges for the storage (so containers can access it)

    bash
  
1

chown -R 101000:101000 <some-file>