unicorn Ruby/Rack server user+dev discussion/patches/pulls/bugs/help
 help / color / mirror / code / Atom feed
* [PATCH] configurator: document net.core.somaxconn sysctl dependency
@ 2015-07-15 21:38 Eric Wong
  0 siblings, 0 replies; only message in thread
From: Eric Wong @ 2015-07-15 21:38 UTC (permalink / raw)
  To: unicorn-public; +Cc: Eric Wong

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


^ permalink raw reply	[flat|nested] only message in thread

only message in thread, other threads:[~2015-07-15 21:38 UTC | newest]

Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-07-15 21:38 [PATCH] configurator: document net.core.somaxconn sysctl dependency Eric Wong

Code repositories for project(s) associated with this inbox:

	../../../unicorn.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).