Minecraft server only wants to use 700mb when it has 11 gb allocated

[RagingKitten]

I couldn't find exactly where to post this as i'm using bukkit for a gui so i decided here since my server uses forge as its jar file. Hello i am typing here because my modded minecraft server apparently doesn't want to use ram i allocated to it. I know for sure i couldn't have done anything wrong i set my _JAVA_OPTIONS in environment variables to -Xmx11000m i got it to work until i added 2 mods but removed them and now it just wants to lag really bad it says in the gui i use says its using 700mb of ram. The 2 mods i added that later got removed was

http://ichun.us/mods/ichunutil/

http://ichun.us/mods/gravity-gun

Im running my server in 1.8 with these current mods:

http://www.curse.com/mc-mods/minecraft/225608-worldedit

https://mrcrayfish.com/mods?id=cfm

Please if anyone knows how to fix this itll help alot.

[RagingKitten]

Cpu:

AMD A10-5757M APU with

Radeon HD Graphics  2.50

GHz

 

What do you mean by what type of internet connection?

[RagingKitten]

All the server gave me was a % which was constantly changing about 20 - 80

Download speed is 65.21Mbps

Upload Speed is 4.02Mbps

 

[RagingKitten]

i still get a % is there some tab at the top i have to click?

[RagingKitten]

ok its about 20% - 80%

 

[RagingKitten]

well there has been times without any lag before and around 4 or 5 people