KVM: how much RAM would I need?
I have decided that I want to move to a KVM vps. Currently have a 512mb vServer vps from Alvotech (512mb was the lowest they offer) but I want complete OS/kernel freedom and control, that's why I think I want a KVM one. However, free -m only shows a little usage with all sites online now:
total used free shared buffers cached Mem: 512 148 363 0 0 83 -/+ buffers/cache: 65 446 Swap: 2048 41 2006
So my basic question is, how much ram would I need for my KVM vps to buy? I want apache2 running with php5-fpm, mysql, trac and a git server. Nothing too fancy. I can choose between 256mb and 512mb, but 512mb is a lot more expensive.
I know KVM uses some more RAM as the kernel is there too, but I hope somebody could provide me with some good advice.
I use http://tuxlite.com to configure all my VPSes and I love it!