i notice a change if i add the min and max ram in the line like this for example: 
 
	 
 
	# Xmx and Xms set the maximum and minimum RAM usage, respectively. 
	# They can take any number, followed by an M or a G. 
	# M means Megabyte, G means Gigabyte. 
	# For example, to set the maximum to 3GB: -Xmx3G 
	# To set the minimum to 2.5GB: -Xms2500M
 
	# A good default for a modded server is 4GB. 
	# Uncomment the next line to set it. 
	-Xmx10240M -Xms8192M  
	 
 
	i need to make more experiments but for now this apparently works.