>>>>The HOST is on Windows 2012R2 and since 2008R2 Ms change the way core (2008) and vcore (2012) are managed. I tried to allocate more Vcores and did not get any improvement.
>>>>Next week, I will try to implement a RAMdisk for all Tmpfile.
>>>
>>>I got very good performance boost by hosting databases and temp folders on a SSD. Incredible. It is actually the main reason skipped the replacement of motherboard and processor, which I regularly did every three years. It's five years now and I don't feel any need.
>>
>>I agree, but in my case the VM is on a 16x PCI-SSD drive. It's already faster then a normal SSD that is SATA or SAS.
>
>Pro tip:
>Do not forget your backup. SSD are a pain to get data back from a broken one. It's much more critical then a HDD, where a few hundred dollars might safe the day.

You are right!

In this server there 2 PCI-SSD drive (Mirrored).