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authorEric Wong <>2011-06-27 08:12:58 +0000
committerEric Wong <>2011-06-27 08:52:47 +0000
commitfb8bb4469849fa2b2241152aea7e9e82bd3cbcc8 (patch)
parent4785db8cf19899756c4a79462fed861a1d1bd96c (diff)
A single Unicorn instance may manage more than 1024 workers
without needing privileges to modify resource limits.  As a
result of this, the "raindrops"[1] gem/library is now a required

TCP socket defaults now favor low latency to mimic UNIX domain
socket behavior (tcp_nodelay: true, tcp_nopush: false).  This
hurts throughput, users who want to favor throughput should
specify "tcp_nodelay: false, tcp_nopush: true" in the listen

Error logging is more consistent and all lines should be
formatted correctly in backtraces.  This may break the
behavior of some log parsers.

The call stack is smaller and thus easier to examine backtraces
when debugging Rack applications.

There are some internal API changes and cleanups, but none that
affect applications designed for Rack.  See "git log v3.7.0.."
for details.

For users who cannot install kgio[2] or raindrops, Unicorn 1.1.x
remains supported indefinitely.  Unicorn 3.x will remain
supported if there is demand.  We expect raindrops to introduce
fewer portability problems than kgio did, however.

2 files changed, 3 insertions, 3 deletions
index d25d15a..e99b00f 100755
@@ -1,7 +1,7 @@
diff --git a/lib/unicorn/const.rb b/lib/unicorn/const.rb
index 45f19b2..eb85837 100644
--- a/lib/unicorn/const.rb
+++ b/lib/unicorn/const.rb
@@ -8,8 +8,8 @@
 # improve things much compared to constants.
 module Unicorn::Const
-  # The current version of Unicorn, currently 3.7.0
-  UNICORN_VERSION = "3.7.0"
+  # The current version of Unicorn, currently 4.0.0
+  UNICORN_VERSION = "4.0.0"
   # default TCP listen host address (, all interfaces)