My mid-2011 running Mavericks is such a dog.  I have 12gb ram in it and it constantly runs with 11.99gb used.  Only way to reduce it is to run purge. I have browser open and that is it.  When the ram is knocked down its quick and snappy but once the memory creeps back to over 11gb it becomes slow and I get a lot of beach balls.  Anything else I can do?
	
		
			
		
		
	
				
			