I’ve set up my Jitsi server around 4 weeks ago (Ubuntu 16.04, installed from repository) and all is working great. But I have noticed one strange thing:
I’m monitoring my servers with Zabbix, and also the availability of the web services are monitored. With this, Zabbix also measures the time until the web page is delivered.
Jitsi usually responds between 100-200ms until the landing page is loaded.
But when a meeting is ongoing, the page load time increases to a constant 15 seconds!
In this example there was one meeting ongoing with two participants. The network traffic was around 8MBit/s in each direction (the server is connected with 1GBit/s), and the CPU was more or less boring at a peak of 4.7% out of 400 (Linux load 0.16/0.08/0.05) during the meeting.
So I don’t see any bottleneck in resources here … but why does the web server respond time go through the sky?