diff --git a/godns.conf b/godns.conf
index 28cc3ee..7ce4b6e 100644
--- a/godns.conf
+++ b/godns.conf
@@ -31,7 +31,7 @@ file = ""
 # redis backend not implemented yet
 backend = "memory"  
 expire = 600  # 10 minutes
-maxcount = 100000
+maxcount = 0 #If set zero. The Sum of cache itmes will be unlimit.
 
 [hosts]
 #If set false, will not query hosts file and redis hosts record