add client_header_buffer_size tuning parameter

We're changing our default to 1K buffers to save memory.  This
should reduce memory usage of idle clients and lower pressure on
the MRI GC.  Rails applications using session cookies (the
default) may want to up this to 2K or more.

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/rainbows.rb b/lib/rainbows.rb
index 4b8d552..0e6ca39 100644
--- a/lib/rainbows.rb
+++ b/lib/rainbows.rb
@@ -67,6 +67,7 @@ module Rainbows
 
   # :stopdoc:
   class << self
+    attr_accessor :client_header_buffer_size
     attr_accessor :max_bytes, :keepalive_timeout
     attr_accessor :server
     attr_accessor :cur # may not always be used
@@ -81,6 +82,10 @@ module Rainbows
   # the default keepalive_timeout is 5 seconds
   @keepalive_timeout = 5
 
+  # 1024 bytes matches nginx, though Rails session cookies will typically
+  # need >= 1500...
+  @client_header_buffer_size = 1024
+
   # :stopdoc:
   @alive = true
   @cur = 0