--- a/samples/knot.sample.conf.in
+++ b/samples/knot.sample.conf.in
@@ -25,6 +25,8 @@ template:
   - id: default
     storage: "@storage_dir@"
     file: "%s.zone"
+    max-journal-db-size: 20M
+    max-timer-db-size: 5M
 
 zone:
 #    # Primary zone
