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I'll have to study to understand the answer by @acidrop . Meanwhile, I have received the new host, slightly different from what stated in my messages. This is OVH host EG-128 with 2 * 4 TB SATA disk and 2 * 420 GB NVMe disk. I set it up like so: root@rautaantenni:/var/lib/vz/SPEED# zpool status...

I realized all disks are SSD. disks should definitely be faster than 50 iops. Was your measurement done while host was completely idle?

PHP folks claim PHP 7 is ten times faster than PHP 5. So there is a possibility to improve speed. Is CentOS 7 an oldish version? Kernel and PHP seen a bit old. Cpu in VM you have set to KVM. Set it to host, that is the fastest. Other than that it looks like a very performant host. How are you...

Let us start from the beginning. What kind of host is proxmox installed on? Cpu ram Disk system Disk controller Is ZFS the file system? How is it set up? Then the same for the virtual host. What all stuff is running on proxmox and on the virtual host? If you have other usefull information to...

The OVH host currently used has gotten too slow in the disk department. I plan to get a new host with SSD or NVMe disks and ZFS file system for Proxmox 5.2. But I'm hesitant on how to use the non-rotating disk. Current host with Proxmox 4.4, same as the below new host except no SSD disks and...

If you run only that one Wordpress site on that virtual server / proxmos host, it should be enough according to pveperf. Put enough memory, and it should run just fine. If you can get faster disk, that would make the server go faster. 50 IOPS is typical for one SATA disk system, so I assume that...

Seems web server is running CentOS 7, and has 2 GB memory. Not much to go by. Type on the proxmox host command line this:pveperf Preferably when nothing is running.

You have provided no information, so it is not possible to give any meaningfull answers.

Use LANG=C ln -s ... To get error message in english. What file system type is that directory on?

@Srinivaskondra Tom answered in #5:

I give up. What are you doing wrong?

They are not commands, but parameters to the kernel start command.

Is pve-manager installed?

Using Internet search engines with proxmox iso archive I found these: https://www.proxmox.com/en/downloads/category/iso-images-pve http://amrc.altervista.org/proxmox-ve-released-iso-archive/

Open a console to that guest to see what happens during boot.

It is software RAID, yes. But why is it so very slow?

Does the password work from the console? Does the password contain special characters like space, ",!,$,( that might cause confusion?

I tested pveperf on OVH Mini HG host: Base Board Information Manufacturer: Intel Corporation Product Name: S2600CW root@rauta:~# lspci | grep SATA 00:11.4 SATA controller: Intel Corporation C610/X99 series chipset sSATA Controller [AHCI mode] (rev 05) 00:1f.2 SATA controller...

There is even a command to do it. Read man apt-get about clean and autoclean.

Try if apt-get autoremove manages to remove those extra kernels.