gistfile1.rb

    #restart if memory or cpu is too high
    w.transition(:up, :restart) do |on|
      if type == :mongrel then
        on.condition(:memory_usage) do |c|
          c.above = 250.megabytes
          c.times = [9,10]
        end

        on.condition(:memory_usage) do |c|
          c.above = 300.megabytes
        end
      else
        on.condition(:memory_usage) do |c|
          c.above = 400.megabytes
          c.times = [9, 10]
        end
      end
    
      on.condition(:cpu_usage) do |c|
        c.interval = 30
        c.above = 50.percent
        c.times = 10
      end
    end