From: Eric Wong <e@80x24.org>
To: unicorn-public@bogomips.org
Cc: Eric Wong <e@80x24.org>
Subject: [PATCH] configurator: document net.core.somaxconn sysctl dependency
Date: Wed, 15 Jul 2015 21:38:51 +0000 [thread overview]
Message-ID: <1436996331-4519-1-git-send-email-e@80x24.org> (raw)
Linux users are effectively capped to 128 on stock installations
and may wonder why connections get rejected with overloaded apps
sooner rather than later.
---
lib/unicorn/configurator.rb | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/lib/unicorn/configurator.rb b/lib/unicorn/configurator.rb
index 32e49c1..02f6b6b 100644
--- a/lib/unicorn/configurator.rb
+++ b/lib/unicorn/configurator.rb
@@ -254,6 +254,11 @@ class Unicorn::Configurator
#
# Default: 1024
#
+ # Note: with the Linux kernel, the net.core.somaxconn sysctl defaults
+ # to 128, capping this value to 128. Raising the sysctl allows a
+ # larger backlog (which may not be desirable with multiple,
+ # load-balanced machines).
+ #
# [:rcvbuf => bytes, :sndbuf => bytes]
#
# Maximum receive and send buffer sizes (in bytes) of sockets.
--
EW
reply other threads:[~2015-07-15 21:38 UTC|newest]
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