[Eugine]

The game just freezes every 20 seconds for like half a second, while the singleplayer runs smoothly.

[Ha$H_Sexyboy]

one server or all servers this happens?

[Eugine]

All servers.

[Karan007]

First suggestion : Delete some mods.(If you have)
Second suggestion : Re-install your SA-MP.
Third suggeston : Re-install your san andreas game.(First re-install your SA-MP and check if the problem continues.)

[Eugine]

It worked, thank you!