Server lag and low fps

My problem is,on my server i receive full error of latency:
"
[16:44:56] [Server thread/WARN]: Can't keep up! Is the server overloaded? Running 4723ms or 94 ticks behind
[16:45:17] [Server thread/WARN]: Can't keep up! Is the server overloaded? Running 6560ms or 131 ticks behind
[16:45:35] [Server thread/WARN]: Can't keep up! Is the server overloaded? Running 2753ms or 55 ticks behind

"

and when i break a bloc or i put i lost my fps on server and solo

Nice bye!!