updated default, added param to example config

bird/bird.go

@@ -50,7 +50,7 @@ func InitializeCache() {
 		}
 	} else { // initialize the MemoryCache
 		maxKeys := CacheConf.MaxKeys
-		maxKeysDefault := 100
+		maxKeysDefault := 60
 		if maxKeys == 0 {
 			log.Println("MaxKeys not set, using default value:", maxKeysDefault)
 			maxKeys = maxKeysDefault

etc/birdwatcher/birdwatcher.conf

@@ -87,6 +87,10 @@ use_redis = false # if not using redis cache, activate housekeeping to save memo
 redis_server = "myredis:6379"
 redis_db = 0
 
+# Maximum numbers of keys in the cache, if the
+# memory cache is used. Does not apply to redis.
+# max_keys = 60
+
 # Housekeeping expires old cache entries (memory cache backend) and performs a GC/SCVG run if configured.
 [housekeeping]
 # Interval for the housekeeping routine in minutes