Limit Disk I/O In Proxmox

[imok]

@Mason

Using “VirtIO” as the SCSI Controller?

VirtIO is.

@Mason

Also, you can experiment changing cache to “write back” to see if that has any improvements.

Thanks. I’m going to try later as this is in production.

@Falzo

however, for your issues I’d rather check how the RAM and swap usage looks like, esp on the host. maybe the system swapping eats your disk bandwidth. from fio it can clearly be seen, that IOps aren’t the problem, but bandwidth is.

Processor  : Intel(R) Xeon(R) CPU E31230 @ 3.20GHz
CPU cores  : 8 @ 3492.204 MHz
AES-NI     : ❌ Disabled
VM-x/AMD-V : ✔ Enabled
RAM        : 31G
Swap       : 0B
df: no file systems processed
Disk       : 

It has 5 VMs:
A. 4GB
B. 16GB
C. 1GB
D. 4GB
E. 8GB

Quite overloaded?

I can’t run YABS because load fires up and everything goes down.