Proxmox VMs randomly freeze


New Member
Nov 14, 2019
I have some problems with my proxmox Virtual Environment 5.4-13. the node and some virtual machines freeze randomly.
Machines concerned are then no longer accessible for a few moments, then are accessible again. This problem is present on 3 out of 4 machines (see capture). Only TSE is ok.

Here is the list of servers:
- DC (Windows server 2012 R2)
- TSE (Windows server 2012 R2)

I had basically a difference between the memory displayed on proxmox and those of the 2 windows servers. I solved the problem by installing the balooning service on both vms.

Here's what I tried to do:
- Restart the node
- Restart vms
- replace the ram bar
- vms restoration

When I create a new vm, the problem is immediately present.

thank you in advance for your help



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Do you do performance monitoring of the Server? It's possible that some resources are scarce. For example, the disks could not be fast enough / overwhelmed.

If you do not do any extra monitoring have a look at the summary page of your server. A high IO delay when your VMs are hanging can be an indicator that the disks are the cause.
Hello Aaron, thanks for your answer. Indeed, the impacted machines seem to have a rather strong I/O curve. However, on the front of the server, I don't have a disk malfunction indicator. The first capture is for the dc server, the second for the tse. Could it be due to one of the disks itself? Is there a way to test the disks to locate the problem?

Thanks a lot


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