[SOLVED] Low TPS on 1.14.4

Hi,
I was using Spigot until a few days ago and decided to switch to Paper and upgraded from 1.14.3 (Spigot) to 1.14.4 (Paper) but I’m having big problems with low TPS.
TPS is going to 4/5 with more than 5 players

Timings: https://timings.aikar.co/?id=d47a8c1687d14268af21aa0dfa7bcf88

VPS:
Intel Xeon X5670 2.93GHz (4 processors)
RAM: 6GB

Can someone help me?

EDIT: I was using Windows Server 2008 and i solved my problem changing to Ubuntu.