Module: LinuxStat::Memory

Defined in:
lib/linux_stat/memory.rb

Class Method Summary collapse

Class Method Details

.available ⇒ Object

Returns the total memory details reported by /proc/meminfo. The value is in Kilobyte.

It retuns an Integer but if the info is not available, it will return nil



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# File 'lib/linux_stat/memory.rb', line 46

def available
  return nil unless meminfo?
  IO.foreach('/proc/meminfo').first(3)[-1].split[1].to_i
end

.percent_available ⇒ Object

Returns the percentage of memory used reported by /proc/meminfo.

It retuns an Integer but if the info is not available, it will return nil



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# File 'lib/linux_stat/memory.rb', line 74

def percent_available
  return nil unless meminfo?
  memory = IO.foreach('/proc/meminfo').first(3)
  memory[2].split[1].to_i.*(100).fdiv(memory[0].split[1].to_i).round(2)
end

.percent_used ⇒ Object

Returns the percentage of memory used reported by /proc/meminfo.

It retuns an Integer but if the info is not available, it will return nil



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# File 'lib/linux_stat/memory.rb', line 64

def percent_used
  return nil unless meminfo?
  memory = IO.foreach('/proc/meminfo').first(3)
  total = memory[0].split[1].to_i
  total.-(memory[2].split[1].to_i).*(100).fdiv(total).round(2)
end

.stat ⇒ Object

Returns the memory details reported by /proc/meminfo. In this format:

{:total=>3836264, :used=>3097952, :available=>738312, :percent_used=>80.75, :percent_available=>19.25}

The values are in Kilobyte.

If the statistics is not available, it will return an empty Hash.



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# File 'lib/linux_stat/memory.rb', line 10

def stat
  return {} unless meminfo?

  memory = IO.foreach('/proc/meminfo').first(3)

  total = memory[0].split[1].to_i
  available = memory[2].split[1].to_i
  used = total - available

  percent_used = total == 0 ? 0.0 : used.*(100).fdiv(total).round(2)
  percent_available = total == 0 ? 0.0 : available.*(100).fdiv(total).round(2)

  # We have all the methods, but each methods reads the same file
  # So better to use the above calculation
  {
    total: total,
    used: used,
    available: available,
    percent_used: percent_used,
    percent_available: percent_available
  }
end

.total ⇒ Object

Returns the total memory details reported by /proc/meminfo. The value is in Kilobyte.

It retuns an Integer but if the info is not available, it will return nil.



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# File 'lib/linux_stat/memory.rb', line 37

def total
  return nil unless meminfo?
  IO.foreach('/proc/meminfo').first.split[1].to_i
end

.used ⇒ Object

Returns the amount of memory used reported by /proc/meminfo. The value is in Kilobyte.

It retuns an Integer but if the info is not available, it will return nil.



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# File 'lib/linux_stat/memory.rb', line 55

def used
  return nil unless meminfo?
  memory = IO.foreach('/proc/meminfo').first(3)
  memory[0].split[1].to_i - memory[2].split[1].to_i
end