def textual_normal_operating_ranges_memory_usage
    h = {:label => _("Memory Usage"), :value => []}
    [:max, _("Max"), :high, _("High"), :avg, _("Average"), :low, _("Low")].each_slice(2) do |key, label|
      value = @record.send("mem_usage_absolute_average_#{key}_over_time_period")
      h[:value] << {:label => label,