3 Core VDS lagging?

[Fr0stbite]

Hi, i ordered a server here before about 2 or 3 months ago with the same configuration / specs. On these servers i run 2 game servers, Garrys mod DarkRP, and Garrys mod Day-Z. Ive had no problems before, but now it seems like when I connect it takes way longer to establish a connection, I had to disable voice because when someone talked the pings would sky rocket to 200 to 300, still even with it disabled players seem to lose packets, and jump across the screen. I'm not the only one that sees the same thing. other people that connect have a 300 ping once they connect, and once they are in the game it jumps to 500 for 30 seconds or so, and drops back to normal which is around 40 - 60 ping. still with this ping players are jumpy. i spoke with a Rep, and he referred me here after preforming a diagnostic with MTR and no results came up.

When the lag happens the server runs at 14% CPU and 41% Memory (1 Server Running at 66 tick)
Running 3 core VPS / VDS configuration (stock)

[soja]

Probably a plugin issue.

What is your servers FPS when everyone has high pings?

What are the exact tickrate/slots for each server, and how full are they when you notice lag.

What CPU does your VDS have?

[Fr0stbite]

Server tickrate is set at 66, i have tested 33 tick also

I notice lag when 6 people were in the server, srcds says its running at 65 FPS

CPU: Xenon E5-2690

[soja]

what do you have set for:
sv_minrate
sv_maxrate

[Fr0stbite]

These settings arent applied in the server config, any suggestions of some settings?

[soja]

sv_minrate 100000
sv_maxrate 0