Bug Sever FPS drops

[Nefroz]

Im playing TPPI, and i keep getting this
2015-02-04 13:09:13 [INFO] [Minecraft-Server] Saving chunks for level 'Copy of New World'/Overworld
2015-02-04 13:09:13 [INFO] [Minecraft-Server] Saving chunks for level 'Copy of New World'/Nether
2015-02-04 13:09:13 [INFO] [Minecraft-Server] Saving chunks for level 'Copy of New World'/The End
2015-02-04 13:09:13 [INFO] [Minecraft-Server] Saving chunks for level 'Copy of New World'/Underdark
2015-02-04 13:09:13 [INFO] [Minecraft-Server] Saving chunks for level 'Copy of New World'/The Moo Moo Farm
2015-02-04 13:09:13 [INFO] [Minecraft-Server] Saving chunks for level 'Copy of New World'/Promised Land
2015-02-04 13:09:13 [INFO] [Minecraft-Server] Saving chunks for level 'Copy of New World'/Bedrock
2015-02-04 13:09:13 [INFO] [Minecraft-Server] Saving chunks for level 'Copy of New World'/Spirit World
2015-02-04 13:09:13 [INFO] [Minecraft-Server] Saving chunks for level 'Copy of New World'/Twilight Forest
2015-02-04 13:09:14 [INFO] [Minecraft-Server] Saving and pausing game...

spammed constantly followed by

2015-02-04 13:06:29 [WARNING] [Minecraft-Server] Can't keep up! Did the system time change, or is the server overloaded?
2015-02-04 13:06:46 [WARNING] [Minecraft-Server] Can't keep up! Did the system time change, or is the server overloaded?
2015-02-04 13:07:08 [WARNING] [Minecraft-Server] Can't keep up! Did the system time change, or is the server overloaded?

Any Ideas?

 

[Moasseman]

According to the timestamp, the "Can't keep up" messages happened before saving the world.

Anyway, they're usually caused by, well, "server" not being able to keep up. There's millions of things that can cause this, and with no more info it's impossible to troubleshoot to the slightest.

As for the save spam, that happens when you press Esc and pause the game.