Issue: The "sv" value in the "net_graph" varies between 1.1 and over 10 in milliseconds clock.
Resault: The four csgo server, that im running on this, server are very laggy.

How can i fix this?

The Server hardware is:
Intel® Xeon® E5-26xxV3 @ 4 cores
12 GB DDR4 RAM (ECC)
240GB SSD

The CPU usage is between 15% and 30%.
The RAM usage is at ~ 5Gb.