gistfile1.rb

class GCTime < Graph
  name 'gc_time'
  title 'Time spent in GC'
  vlabel 'microseconds'
  category 'gc'

  gc_len 'musec in GC'

  def self.fetch
    if GC.respond_to? :time
      @last ||= 0
      value :gc_len, GC.time - @last
      @last = GC.time
    end
    super
  end
end

class GCCount < Graph
  name 'gc_count'
  title 'GC runs per minute'
  vlabel 'num per min'
  scale 'no'
  category 'gc'
  period 'minute'

  default :type => 'DERIVE',
          :min => 0

  gc_count 'number of gc runs'

  def self.fetch
    if GC.respond_to? :collections
      value :gc_count, GC.collections
    end
    super
  end
end

if GC.respond_to? :num_objects
  class GCObjects < Graph
    name 'gc_objects'
    title 'live ruby objects'
    vlabel 'number of objects'
    category 'gc'

    obj_count 'number of objects'

    def self.fetch
      value :obj_count, GC.num_objects
      super
    end
  end
end

if GC.respond_to? :malloc_limit
  class GCMallocLimit < Graph
    name 'gc_malloc_limit'
    title 'GC malloc limit'
    vlabel 'bytes'
    category 'gc'

    malloc_limit 'malloc limit'

    def self.fetch
      value :malloc_limit, GC.malloc_limit
      super
    end
  end
end

if GC.respond_to? :num_heaps
  class GCNumHeaps < Graph
    name 'gc_num_heaps'
    title 'GC num heaps'
    vlabel 'number'
    category 'gc'

    num_heaps 'number of heaps'

    def self.fetch
      value :num_heaps, GC.num_heaps
      super
    end
  end
end