mod_smacks: Limit queue memory consumption using new util This brings back the queue size limit that was once added, then removed because destroying the session when reaching the limit was not great. Instead, the queue wraps and overwrites the oldest unacked stanza on the assumption that it will probably be acked anyway and thus does not need to be delivered. If those discarded stanzas turn out to be needed on resumption then the resumption fails.

author: Kim Alvefur <zash@zash.se>
date: Tue, 14 Dec 2021 20:00:45 +0100
parent: 12023:5a3781a12285
child: 12122:50795249b7be
--- a/plugins/mod_admin_shell.lua	Tue Dec 14 19:58:53 2021 +0100
+++ b/plugins/mod_admin_shell.lua	Tue Dec 14 20:00:45 2021 +0100
@@ -815,7 +815,7 @@
 		width = 8;
 		align = "right";
 		mapper = function (queue)
-			return queue and tostring(#queue);
+			return queue and tostring(queue:count_unacked());
 		end
 	};
 	csi = {