Problems for cs: go fps and lag

Hello, about a week before my cs: go servers began to strike.

Quote:I have little problem with my server, if i have 10-24 players in server lerp is red. You can look that picture:

And when lerp is red, i have lags in my server. So do you have any ideas to fix that?


My VPS server info:

Intel® Core™ i7-3770K CPU @ 3.50GHz
8 x 3.5 GHZ
6 GB RAM

ubuntu 14.04

How do I fix this thing????