diff -r 10bea0941bab -r 3413fea9e6db util/startup.lua
--- a/util/startup.lua	Fri Apr 30 21:20:14 2021 +0100
+++ b/util/startup.lua	Fri May 07 16:41:39 2021 +0100
@@ -12,7 +12,13 @@
 
 local original_logging_config;
 
-local default_gc_params = { mode = "incremental", threshold = 105, speed = 250 };
+local default_gc_params = {
+	mode = "incremental";
+	-- Incremental mode defaults
+	threshold = 105, speed = 500;
+	-- Generational mode defaults
+	minor_threshold = 20, major_threshold = 50;
+};
 
 local short_params = { D = "daemonize", F = "no-daemonize" };
 local value_params = { config = true };