diff --git a/runtime/functions b/runtime/functions
index a9be034..c0a65ea 100755
--- a/runtime/functions
+++ b/runtime/functions
@@ -148,7 +148,7 @@ configure_hot_standby() {
       set_postgresql_param "wal_level" "hot_standby"
       set_postgresql_param "max_wal_senders" "16"
       set_postgresql_param "checkpoint_segments" "8"
-      set_postgresql_param "wal_keep_segments" "32"
+      set_postgresql_param "wal_keep_size" "512"
       set_postgresql_param "hot_standby" "on"
       ;;
   esac