From 6bd8c6732e7ccda0013a3373c3618fca91c91d36 Mon Sep 17 00:00:00 2001
From: Joey Hess <joey@kitenet.net>
Date: Tue, 9 Oct 2012 17:03:52 -0400
Subject: add cgi_overload_delay tunable

Try to avoid a situation in which so many ikiwiki cgi wrapper programs are
running, all waiting on some long-running thing like a site rebuild, that
it prevents the web server from doing anything else. The current approach
only avoids this problem for GET requests; if multiple cgi's run GETs on a
site at the same time, one will display a "please wait" page for a
configurable number of seconds, which then redirects to retry. To enable
this protection, set cgi_overload_delay to the number of seconds to wait.
This is not enabled by default.
---
 IkiWiki.pm | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'IkiWiki.pm')

diff --git a/IkiWiki.pm b/IkiWiki.pm
index f68797ae3..a7dc6b36b 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -118,6 +118,14 @@ sub getsetup () {
 		safe => 0,
 		rebuild => 0,
 	},
+	cgi_overload_delay => {
+		type => "string",
+		default => '',
+		example => "10",
+		description => "number of seconds to delay CGI requests when overloaded",
+		safe => 1,
+		rebuild => 0,
+	},
 	rcs => {
 		type => "string",
 		default => '',
-- 
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