Windows Server 2016 server running slow

[Vitinhos]

Good morning!
Here at the company we have a Dell T610 server, virtualized with a Promox 7.3 with a pfSense firewall, Windows Server 2016 and two Windows 10 VMs.
Windows Server is very slow, especially in the database, which is SQL Anywhere. There's plenty of CPU and RAM, there's no bottleneck. When running a disk benchmark, I found that the disk is running at a much lower speed, as it is an SSD, the speed should be much higher. What could I be doing to improve the performance of my server?
There are two 1TB SSD disks in RAID 1 and the disks are stored in local-lvm

Attached are prints

 

[cwt]

Speed depends on a lot of factors. A simple RAID1 SSD setup is enough for PVE itself but if the local-lvm is also used for multiple VMs you‘ll face concurrent drive access from the host itself and the VMs. It‘s usually better to use two smaller SSDs for PVE and add additional drives for a dedicated VM storage.
What kind of SSDs are you using? Consumer hardware or enterprise disks with plp? Benchmarking with tools like CDM or ASSD inside the VM is relatively useless when your RAID is based on ZFS.

 

[_gabriel]

local-lvm = no zfs
What is your hw controller ?
is there a cache with battery power protected ?