You can use old machines for all kinds of servers, I’ve got a stack of old laptops running a Kubernetes cluster, but synapse would push some of them possibly further than they can go so I have it on my more powerful NAS, and even then it isn’t exactly speedy at times
Lots of decent suggestions here so not going to repeat them, but I do have a couple of my own if using synapse:
Basically synapse is just a resource hog, and you need to plan for that. The database itself grows quicker than you’d expect as well
I thought that I could run the server on an old and not very good computer. Is not it?
You can use old machines for all kinds of servers, I’ve got a stack of old laptops running a Kubernetes cluster, but synapse would push some of them possibly further than they can go so I have it on my more powerful NAS, and even then it isn’t exactly speedy at times