I am looking for some tips for getting a FTB Ultimate server server up to speed. I constantly get the "Can't Keep Up" messages.
I am running a FTB ultimate 1.1.2 server on Windows 2008 R2, with an AMD FX 4170 Quad-Core @ 4.20 GHZ and 8 GB of RAM. The server itself is running on a dedicated WD Black SATA 3 drive. This drive is currently only in use by the FTB server.
There are only two of us on the server at the moment, and I am on the same local network. Both of us experience jerkiness and general lag. Lately my friend has been experiencing upwards of one minute just to open the crafting table.
There have been no changes to the FTB server aside from general changes to the GregTech and Advanced solar panel configs. The lag was happening before that as well.
I have noticed that at times the Minecraft server has worlds listed as having 5000+ chunks cached, or close to 2 GB of RAM allocated. The server generally is at 60-70% CPU usage.
My startup config is pretty basic, but is allowing a max of 5GB:
"C:\Program Files\Java\jre7\bin\java" -Xms512M -Xmx5G -jar ftbserver.jar
I am currently running Java 64-bit, version 7 Update 25