class Riemann::Babbler::Plugin::Memory

Public Instance Methods

collect() click to toggle source
# File lib/riemann/babbler/plugins/memory.rb, line 9
def collect
  m       = File.read('/proc/meminfo').split(/\n/).inject({}) { |info, line|
    x          = line.split(/:?\s+/)
    info[x[0]] = x[1].to_i
    info
  }
  free    = m['MemFree'].to_i * 1024
  cached  =m['Cached'].to_i * 1024
  buffers =m['Buffers'].to_i * 1024
  total   = m['MemTotal'].to_i * 1024
  used    = total - free
  free_bc = free + buffers + cached

  fraction      = 1 - (free_bc.to_f / total)
  swap_fraction = m['SwapTotal'] == 0 ? 0 : 1 - m['SwapFree'].to_f/m['SwapTotal']

  desc = "#{shell('ps -eo pmem,pid,cmd --sort -pmem | head -3').chomp}"
  [
      { :service => plugin.service + ' % free', :description => 'Memory usage, %', :metric => fraction.round(2) * 100 },
      { :service => plugin.service + ' % swap', :description => 'Swap usage, %', :metric => swap_fraction.round(2) * 100 },
      { :service => plugin.service + ' abs free', :description => "Memory free (kB)\n\n #{desc}", :metric => free, :state => 'ok' },
      { :service => plugin.service + ' abs total', :description => "Memory total (kB)\n\n #{desc}", :metric => total, :state => 'ok' },
      { :service => plugin.service + ' abs cached', :description => "Memory usage, cached (kB)\n\n #{desc}", :metric => cached, :state => 'ok' },
      { :service => plugin.service + ' abs buffers', :description => "Memory usage, buffers (kB)\n\n #{desc}", :metric => buffers, :state => 'ok' },
      { :service => plugin.service + ' abs used', :description => "Memory usage, used (kB)\n\n #{desc}", :metric => used, :state => 'ok' },
      { :service => plugin.service + ' abs free_bc', :description => "Memory usage with cache and buffers (kB)\n\n #{desc}", :metric => free_bc, :state => 'ok' }
  ]
end
init() click to toggle source
# File lib/riemann/babbler/plugins/memory.rb, line 3
def init
  plugin.set_default(:service, 'memory')
  plugin.states.set_default(:warning, 70)
  plugin.states.set_default(:critical, 85)
end