util.startup: Set more aggressive defaults for GC

Testing has demonstrated that the default GC parameters are not
sufficient to prevent runaway memory growth when running under Lua 5.2
and Lua 5.3.

Setting the GC speed to 500 was tested on Lua versions 5.1->5.4 and did
not display unbounded memory growth.

1 files changed, 7 insertions, 1 deletions

diff --git a/util/startup.lua b/util/startup.lua
index c1f4ec8b..b3857830 100644
--- a/util/startup.lua
+++ b/util/startup.lua
@@ -12,7 +12,13 @@ local dependencies = require "util.dependencies";
 
 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 };