This directive controls the IP cache LRU replacement algorithm. The replacement function runs periodically and removes the least recently used IP cache entries until reaching this low watermark. You should have almost no reason to change this value. You'd be better off changing ipcache_size instead.

Syntax	ipcache_low percent
Default	ipcache_low 90
Example	ipcache_low 95
Related	ipcache_size, ipcache_high