My appendcache setup seems to work. But the VPS is still too slow and I added 500GB of storage. 2 shared vCPU and 4GB RAM also seem to be too little. Right now it will take approximately 5 days to import all of Europe, so roughly 20 Days for the planet. So whoever wants to use a small VPS, 2 CPU cores and 4GB RAM are too little for the world. But 8GB RAM and 4 Cores seem to be reasonable. 10 Days for the initial import.