as subject. I want phalcon on a small .5Gb vps. Is there any way to do it?
You can set up a swap space to increase memory:
https://www.digitalocean.com/community/tutorials/how-to-add-swap-space-on-ubuntu-16-04 (for debian based linux distros)
Or, you could set up a virtual box with the matching OS distro and compile it on your local machine, then upload it to the VPS
I've noticed another thread you've posted where you mention you use CentOS 7, check this thread for a repo:
Few ways to do it: