SSD volumes are physically on the same node, and afaik not redundant. The cloud vms are ceph clusters behind the scenes, and writes need to commit for 3+ machin

SSD volumes are physically on the same node, and afaik not redundant. The cloud vms are ceph clusters behind the scenes, and writes need to commit for 3+ machines. It's both network latency and inherent process latency Additionally, hetzner has an IOPS limit of 5000 and write limit of some amount that does not scale with the size of database. 50G has the same limits as 5TB. For this reason, people are sometimes using different table spaces in postgres for example. Ceph puts another burden on top of already-ceph-based cloud volumes, btw, so don't do that.