Better Valgrind script.

Rakefile

@@ -23,7 +23,7 @@ task :exceptions do
 end
 
 task :valgrind do
-  exec("valgrind  --tool=memcheck --leak-check=yes --show-reachable=no --num-callers=15 --track-fds=yes ruby #{File.dirname(__FILE__)}/test/profile/valgrind.rb")
+  exec("valgrind  --tool=memcheck --leak-check=full --show-reachable=no --num-callers=15 --track-fds=yes --workaround-gcc296-bugs=yes --max-stackframe=7304328 --dsymutil=yes --track-origins=yes ruby #{File.dirname(__FILE__)}/test/profile/valgrind.rb")
 end
 
 task :profile do

test/profile/valgrind.rb

@@ -5,6 +5,8 @@ $LOAD_PATH << "#{File.dirname(__FILE__)}/../../lib/"
 require 'memcached'
 require 'rubygems'
 
+GC.copy_on_write_friendly = true if GC.respond_to?("copy_on_write_friendly=")
+
 class Worker  
   def initialize(method_name, iterations)
     @method = method_name || 'mixed'