Objects larger than this size will NOT be saved on disk.  The
	value is specified in kilobytes, and the default is 4MB.  If
	you wish to get a high BYTES hit ratio, you should probably
	increase this (one 32 MB object hit counts for 3200 10KB
	hits).  If you wish to increase speed more than your want to
	save bandwidth you should leave this low.

	NOTE: if using the LFUDA replacement policy you should increase
	this value to maximize the byte hit rate improvement of LFUDA!
	See replacement_policy below for a discussion of this policy.