I'm not hosting it perse. It's a on a paid hosting service. I chose the lowest cost solution.
Occasionally users (and I) see a Resource Limit Reached error but it typically bounces right back into action using the browser button.
AFAIK no one has cited lockups yet.
Because of the Resource Limit Reached messages I am looking into a VPS (Virtual Private Server) to move the forum over to. I expect that to be completed in January 2018.
In the meantime maybe
Plan B will suit your needs?