>From my previous experience, I can't say, it's a correct.
I'm using asterisk (over 3 years) and kamailio (about 1 year) in a *production* environment using Xen and I have almost no problems with timers (they were previously with 100Hz),
but I have experienced A LOT of problems with asterisk or any voip-related projects using OpenVZ.
So from my own perspective, OpenVZ (which is a more cheaper) is only suitable for hosting (web or such of tasks) or any non-realtime tasks.
Maybe it was caused by incorrect settings on host (which was out of my control).
Maybe I'm wrong but to me, Xen is better vs OpenVZ :-)
That's weird. I've been using OpenVZ in productions sites handling 1500 concurrent calls without any issues. For years.
I guess it's a matter of personal preferences. Good to hear that you have it working in Xen!