We’ve installed Jitsi with coturn and nginx on a Contabo VPS with 8 cores, 30G RAM and 600MBit/s bandwidth. When doing calls on our instance we often experience disconnections and generally bad performance, even with few users (less than 5). It’s not bad for the single user but for everyone.
I checked server parameters and resources are far from exhaustion (graphs below).
Doing the same calls on meet.jit.si with the same users results in much better experience. Contabo VPSes sucks in term of disk IO, but according to the graph it doesn’t seems the culprit as IOwait is barely visible.
What could cause so much difference in result?