unicorn.rb for a ec2 micro instance

unicorn.rb

worker_processes 2 
working_directory "/var/www/apps/myapp/current"
preload_app true
if GC.respond_to?(:copy_on_write_friendly=)
  GC.copy_on_write_friendly = true
end
timeout 70

# This is where we specify the socket.
# We will point the upstream Nginx module to this socket later on
listen "/tmp/myapp.socket", :backlog => 512

pid "/var/www/apps/myapp/current/tmp/pids/unicorn.myapp.pid"

# Set the path of the log files inside the log folder of the testapp
stderr_path "/var/www/apps/myapp/shared/log/unicorn.stderr.log"
stdout_path "/var/www/apps/myapp/shared/log/unicorn.stdout.log"

before_fork do |server, worker|
# This option works in together with preload_app true setting
# What is does is prevent the master process from holding
# the database connection
  defined?(ActiveRecord::Base) and
    ActiveRecord::Base.connection.disconnect!

  old_pid = "#{server.config[:pid]}.oldbin"
  if File.exists?(old_pid) && server.pid != old_pid
    begin
      Process.kill("QUIT", File.read(old_pid).to_i)
    rescue Errno::ENOENT, Errno::ESRCH
      # someone else did our job for us
    end
  end

end

after_fork do |server, worker|
  # per-process listener ports for debugging/admin/migrations
  # addr = "127.0.0.1:#{9293 + worker.nr}"
  # server.listen(addr, :tries => -1, :delay => 5, :tcp_nopush => true)

  # the following is *required* for Rails + "preload_app true",
  defined?(ActiveRecord::Base) and
    ActiveRecord::Base.establish_connection

  # if preload_app is true, then you may also want to check and
  # restart any other shared sockets/descriptors such as Memcached,
  # and Redis.  TokyoCabinet file handles are safe to reuse
  # between any number of forked children (assuming your kernel
  # correctly implements pread()/pwrite() system calls)
end