You must have read, at least once, that Proxmox recommend "enterprise" SSDs for their virtualisation stack. But why does it shred regular SSDs? It would not have to, in fact the modern ones, even without PLP, can endure as much as 2,000 TBW per life. But where do the writes come from? ZFS? Let's have a look.
The below is particularly of interest for any homelab user, but in fact everyone who cares about wasted system performance might be interested.
If you have a cluster, you can actually safely follow this experiment. Add a new "probe" node that you will later dispose of and let it join the cluster. On the "probe" node, let's isolate the configuration state backend database onto a separate filesystem, to be able to benchmark only pmxcfs - the virtual filesystem that is mounted to /etc/pve
and holds your configuration files, i.e. cluster state.
dd if=/dev/zero of=/root/pmxcfsbd bs=1M count=256