Low performace after vm migration

Hi all,
last week I've migrate ISP VM fro vmware to proxmox hypervisor. I've no problem to boot VM and all service running, but I've a low performance on all domains on it.
Only page that don't have any issues is admin page, it load instantly.
the booting time of vm as 3sec after grub and no apparently error.
On my "blog" hosted on it the loading time for homepage is about 5second, and the first post load after 3-4sec. next refresh or page opened is load immediately. If i restore the esxi vm all work good.
What going wrong?

 

How to performer?
The host is the same, I've only change hypervisor.
And move the datastore from iscsi to nfs.
Other machine that I've are not affected.

 

I've Lost to inform you that I've tryed to move it to pve disk, its nvme, but same result.

 

For name resolution iwill check later. For the test of disk inside vm what tool ive to use?

 

Hi,
i've tested the disk and this is the result
administrator@cloudy:~$ dd if=/dev/zero of=/tmp/test1.img bs=1G count=1 oflag=dsync
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 1.02829 s, 1.0 GB/s
administrator@cloudy:~$ dd if=/dev/zero of=/tmp/test2.img bs=512 count=1000 oflag=dsync
1000+0 records in
1000+0 records out
512000 bytes (512 kB, 500 KiB) copied, 0.358876 s, 1.4 MB/s

administrator@cloudy:~$ dd if=/dev/zero of=/tmp/test2.img bs=1000000 count=1000 oflag=dsync
1000+0 records in
1000+0 records out
1000000000 bytes (1.0 GB, 954 MiB) copied, 1.29072 s, 775 MB/s

 

UPDATE:
today I've spent some time on it and after update seems to be work correctly.
But now when i trying to update ispconfig to latest version i get PHP Curl module is missing, but is installed.

 

Solved by restore repository for multiversion PHP and set default php to v7.3, after this all update work correctly.

thank's for support