From 2c972f3d70caf99488fff300341450e48be6ebf1 Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Sat, 9 Jul 2016 03:18:35 +0000
Subject: www: add configurable limiters

Currently only for git-http-backend use, this allows limiting
the number of spawned processes per-inbox or by group, if there
are multiple large inboxes amidst a sea of small ones.

For example, a "big" repo limiter could be used for big inboxes:
which would be shared between multiple repos:

[limiter "big"]
	max = 4
[publicinbox "git"]
	address = git@vger.kernel.org
	mainrepo = /path/to/git.git
	; shared limiter with giant:
	httpbackendmax = big
[publicinbox "giant"]
	address = giant@project.org
	mainrepo = /path/to/giant.git
	; shared limiter with git:
	httpbackendmax = big

; This is a tiny inbox, use the default limiter with 32 slots:
[publicinbox "meta"]
	address = meta@public-inbox.org
	mainrepo = /path/to/meta.git
---
 lib/PublicInbox/Qspawn.pm | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'lib/PublicInbox/Qspawn.pm')

diff --git a/lib/PublicInbox/Qspawn.pm b/lib/PublicInbox/Qspawn.pm
index cc9c340d..697c55a1 100644
--- a/lib/PublicInbox/Qspawn.pm
+++ b/lib/PublicInbox/Qspawn.pm
@@ -47,7 +47,7 @@ sub start {
 	my ($self, $limiter, $cb) = @_;
 	$self->{limiter} = $limiter;
 
-	if ($limiter->{running} < $limiter->{limit}) {
+	if ($limiter->{running} < $limiter->{max}) {
 		_do_spawn($self, $cb);
 	} else {
 		push @{$limiter->{run_queue}}, [ $self, $cb ];
@@ -59,9 +59,10 @@ use strict;
 use warnings;
 
 sub new {
-	my ($class, $limit) = @_;
+	my ($class, $max) = @_;
 	bless {
-		limit => $limit || 1,
+		# 32 is same as the git-daemon connection limit
+		max => $max || 32,
 		running => 0,
 		run_queue => [],
 	}, $class;
-- 
cgit v1.2.3-24-ge0c7