Piping from Quarries bringing server-wide massive FPS drops

[waycooler]

Launcher/pack Version: 0.5.4.8/2.1.0

Operating System: Windows 7 Ultimate 64bit

Version of Java: 1.7.0_03

Description of Problem: I have a quarry set up, piping to chests. When there hasn't been anybody logged into the server for a while, as soon as someone logs in, the server starts spamming CAN'T KEEP UP and FPS is below 1 for everyone who attempts to log in (literally 1 frame every 3 or so seconds). I found, on top of/under one spot on the pipes, a huge pile of drops, i.e. everything the quarry dug up, in one spot. Picking them up and sending them through the piping system (usually a good 3-4 inventories worth of drops) fixes the problem and everyone's FPS shoots back up to normal levels. I've got a fairly beast desktop and my FPS drops below 1 the same as the rest.

I feel like this is probably because the chunk with the pipes is unloading since nobody is online, but what do I know?

Error Messages: "Server can't keep up" spam

Link to pastebin of log: http://pastebin.com/vR3jF7iT

[Mastergalen]

All you can do is run

//remove item -1

regularly. Or disable quarries if you don't want to do that regularly.

The command deletes all the items on the ground and requires you to have World Edit installed (Tekkit comes bundled with w/e)