The default maxmemory policy is now noeviction.

This is safer as by default maxmemory should just set a memory limit
without any key to be deleted, unless the policy is set to something
more relaxed.

redis.conf

@@ -416,7 +416,7 @@ slave-priority 100
 #
 # The default is:
 #
-# maxmemory-policy volatile-lru
+# maxmemory-policy noeviction
 
 # LRU and minimal TTL algorithms are not precise algorithms but approximated
 # algorithms (in order to save memory), so you can tune it for speed or

src/redis.h

@@ -323,7 +323,7 @@
 #define REDIS_MAXMEMORY_ALLKEYS_LRU 3
 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
 #define REDIS_MAXMEMORY_NO_EVICTION 5
-#define REDIS_DEFAULT_MAXMEMORY_POLICY REDIS_MAXMEMORY_VOLATILE_LRU
+#define REDIS_DEFAULT_MAXMEMORY_POLICY REDIS_MAXMEMORY_NO_EVICTION
 
 /* Scripting */
 #define REDIS_LUA_TIME_LIMIT 5000 /* milliseconds */