--- a/samples/knot.sample.conf.in
+++ b/samples/knot.sample.conf.in
@@ -13,6 +13,8 @@ log:
 
 database:
     storage: "@storage_dir@"
+    journal-db-max-size: 20M
+    timer-db-max-size: 5M
 
 remote:
 #  - id: secondary