Problem Direwolf20_1_5 Rubberbanding Issues

[Sytharin]

Server Specs
Ubuntu 12.04.2 LTS x64
Mobo: X9SCL
RAM: 32GiB 1333MHz
CPU: Intel Xeon E3-1240 V2 3.40GHz
64GiB SSD with a 1TB HDD Storage

50MB dl / 5MB up Cable Internet
Asus RT-AC66U Router

Java Version
JDK 1.7.0_25-b15 x64
ServerStart.sh Java arguments:
java -server -Xms5G -Xmx10g -jar ftbserver.jar (have tried several different argument lists, none seem to have an effect)

FTB 1.2.6 with Direwolf20_1_5 1.0.0
Biomes_O_Plenty enabled
No other mods added

Minecraft world folder loaded into a 10GiB ramdisk. Worldsize ~200MB avg 5 players peak 20

Currently, the server will rubberband players for ~2 seconds on the average of twice per minute. The rubberbanding affects block updates, entity location and chest opening/closing. The actions do not freeze, though, as mobs will still hit you and your player will appear where you were going after the spike stops, the server is still going through the motions, but clientside, everything freezes for a second or two. This occurs for users that are using either the local IP or the external IP

Ran 1.4 Direwolf20 on the same machine for quite a while with no issues.

Changes between 1.4 and now include:
The new Asus router
Java version 1.7 instead of 1.6
Switch from 35MB upload to 5MB upload after moving (What hurts the most, is being so close... to FiOS)
Obviously the Direwolf20 version

Frankly obsessing over this one. I used JVisualVM to locate what class was using the most resources, and it appears to be the Lighting engine, and there are quite a few light render glitches that repair themselves when the player enters them, but the re-rendering of the lighting does not seem to correspond with the lag bursts.

Any info or assistance is greatly appreciated.

 

[DZCreeper]

It would appear that the lower upload speed is shitting on your plans to host a server from home. Just in case I am wrong about that cause, can you try your old router?

 

[cjm721]

Well I think it more be due to saving if its not constant. That it is auto saving twice a minute.

 

[Sytharin]

It would appear that the lower upload speed is shitting on your plans to host a server from home. Just in case I am wrong about that cause, can you try your old router?

After some extensive testing over the weekend without internet plugged in, just playing over our intranet, I have confirmed the lag still exists without any internet connection, so up/down speed is out of the picture. I believe it to be my router or IP setup on the server. I checked the link speed and it is set correctly to a 1gB setting. I dug into the settings to see if it was my server, so I have not yet done a test to see if it specifically my new router yet. I also plan to take it back to my previous residence to see if the FiOS line offers any change in performance. Any other ideas?

Well I think it more be due to saving if its not constant. That it is auto saving twice a minute.

I have the chron job set to every 5 minutes when the RAMDisk gets pulled onto the hard drive, is there another save I am missing out on?

 

[Eyamaz]

You can try the arguments listed in my profile. I haven't done any server specific profiling for them as of yet.