分享php5-fpm.sock

I have a web server running NGINX that serves multiple websites. Can I share the same php5-fpm.sock between all the sites?

I am currently doing it for 2 of the sites (one is vbulletin and the other is mediawiki) and have not seen any issues, but I am not sure if this is a recommended best practice?

Thanks!

You can, it's normal practice. You would use different sockets if you have security concerns or if you need different PHP configurations.

Of course you could add more sockets/pools to utilize more processes, e.g. CPU count.