[Possibly fixed] Suddenly low FPS in FTB infinity server

@Rocknoz wrote:

Modpack: FTB infinity

Modpack Version: Recommended (1.7)

Link to log: http://paste.feed-the-beast.com/view/39527e28

Description of issue:

I host a server locally with two friends joining me from other networks (no LAN connection). This all worked fine before, but recently our entire base doesn't allow more than 15 fps, with >10 fps being quite normal. Between the normal and lowered fps, no real changes happened to the base, so the origin of those fps drops are a mystery. I blamed logipipes since they render all items going through, but shutting down everything that puts stuff into it didn't help.
I've put the server loop below;
:server_loop
if exist autostart.stamp (
del /f /q autostart.stamp > nul 2>1
echo If you want to completely stop the server process now, press Ctrl+C before the time is up!
for /l %%i in (5,-1,1) do (
echo Restarting server in %%i
choice /t 1 /d y > nul
)
echo Starting server now
java -server -Xms512M -Xmx5120M -XX:PermSize=2048M -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XX:+CMSClassUnloadingEnabled -XX:ParallelGCThreads=2 -XX:MinHeapFreeRatio=5 -XX:MaxHeapFreeRatio=10 -jar FTBServer-1.7.10-1614.jar nogui
echo Server process finished
goto :server_loop

My PC has 16gb of RAM, and according to task manager, only 65% of it is used. My instance has 5GB RAM allocated and uses about 50% of it. My processer averages around 55% usage as well.

Does somebody have ideas to where this lag comes from?

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