Ability to visualize overallocation

[grobs]

Hi everyone,

Proxmox allow local RAM/disk overallocation (infinite "virtual" allocation whereas physical host has finite ressources) which is a great tool to optimize use of ressources. But overallocation can be tricky as it represent a risk for the global host (Out Of Memory, No space left on device ...).

Is there any way to visualize RAM and disk overallocation on a specific Proxmox host?
If not, it could be great to have that information and eventually to be able to set an alarm when passing through a manually set threshold of RAM / Disk overallocation.

Best regards

 

[guletz]

You can use monit, like this pseudo-code:

If free-ram-on-node < xxx then alarm-me
or
if free-ram-on-host < yyy then halt-vm-yyyy

 

[wahmed]

We use Zabbix for monitoring Pmx nodes and auto notifications.

 

[grobs]

Ok thanks!
In fact, I already do it with nagios / NRPE but I think it would be very nice to have this directly into the Proxmox GUI. Don't you?
It would help to make good decisions regarding overallocation risk when creating or migrating containers/VM.

 

[guletz]

It would help to make good decisions regarding overallocation risk when creating or migrating containers/VM.

If you want to make a good decision about this, you will need some graphics so you can take the best decisions. Even in this case the decision is not so easy as you think.