if we read a expired key, misses++

src/db.c

@@ -102,7 +102,10 @@ robj *lookupKeyReadWithFlags(redisDb *db, robj *key, int flags) {
         /* Key expired. If we are in the context of a master, expireIfNeeded()
          * returns 0 only when the key does not exist at all, so it's safe
          * to return NULL ASAP. */
-        if (server.masterhost == NULL) return NULL;
+        if (server.masterhost == NULL) {
+            server.stat_keyspace_misses++;
+            return NULL;
+        }
 
         /* However if we are in the context of a slave, expireIfNeeded() will
          * not really try to expire the key, it only returns information
@@ -121,6 +124,7 @@ robj *lookupKeyReadWithFlags(redisDb *db, robj *key, int flags) {
             server.current_client->cmd &&
             server.current_client->cmd->flags & CMD_READONLY)
         {
+            server.stat_keyspace_misses++;
             return NULL;
         }
     }