proxmox nvme disk performance very slow

currently, it's possible that you are cpu limited, as 1disk in a vm can only use 1core for input/ouput.

since qemu 9.0, it's possible to have multithreading to use multiple cores by disk, but it's not yet implemented in pve.
 
spirit said:
currently, it's possible that you are cpu limited, as 1disk in a vm can only use 1core for input/ouput.

since qemu 9.0, it's possible to have multithreading to use multiple cores by disk, but it's not yet implemented in pve.
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However, the same setup with hpe DL380 gen10 plus v2 server the performance is good as expected
 
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