Module: NewRelic::IA::IostatReader::OSX

Defined in:
lib/new_relic/ia/iostat_reader/osx.rb

Constant Summary collapse

BYTES_PER_MB = 
1048576

Instance Method Summary collapse

Instance Method Details

#cmd ⇒ Object 



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# File 'lib/new_relic/ia/iostat_reader/osx.rb', line 2

def cmd; "iostat -dCI 15"  ; end

#init ⇒ Object 



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# File 'lib/new_relic/ia/iostat_reader/osx.rb', line 4

def init
  # get the first header
  header               = @pipe.gets
  @disk_count          = header.split("\s").size - 1
  @pipe.gets # skip the second header
  @pipe.gets # skip the first line, uptime summary
  @running_total        = 0
end

#read_next ⇒ Object 



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# File 'lib/new_relic/ia/iostat_reader/osx.rb', line 13

def read_next
  # The running total of MB transferred
  line = @pipe.gets.chomp while line.nil? || line =~ /cpu|id/ # skip if it's a header line
  values             = line.split("\s")
  current_total      = 0.0
  # Iterate over each disk's stats
  @disk_count.times do | disk_number |
    values.shift
    values.shift
    v = values.shift.to_f
    current_total += v
  end
  data_point = current_total - @running_total
  log.debug "Disk usage: #{data_point} mb (#{@running_total})"
  io_stats.record_data_point(data_point * BYTES_PER_MB)
  @running_total = current_total
  # Get the CPU stats
  user, system, idle = values.map { |v| v.to_f }
  log.debug "CPU #{user}% (user), #{system}% (system)"
  user_cpu.record_data_point(user)
  system_cpu.record_data_point(system)
end