Module: LinuxStat::Swap
- Defined in:
- lib/linux_stat/swap.rb
Class Method Summary collapse
-
.any? ⇒ Boolean
Returns true if any swap device is available, else returns false.
-
.available ⇒ Object
Show total amount of available swap.
-
.list ⇒ Object
List all swap devices and returns a Hash.
-
.percent_available ⇒ Object
Shows the percentage of swap available.
-
.percent_used ⇒ Object
Show percentage of swap used.
-
.stat ⇒ Object
Show aggregated used and available swap.
-
.total ⇒ Object
Shows total amount of swap.
-
.used ⇒ Object
Show total amount of used swap.
Class Method Details
.any? ⇒ Boolean
Returns true if any swap device is available, else returns false.
If the info isn’t available, it will return an empty Hash.
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# File 'lib/linux_stat/swap.rb', line 22 def any? !!IO.foreach('/proc/swaps'.freeze).first(2)[1] end |
.available ⇒ Object
Show total amount of available swap.
The value is in kilobytes.
The return type is a Integer but if the info isn’t available, it will return nil.
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# File 'lib/linux_stat/swap.rb', line 68 def available return nil unless swaps_readable? values_t = read_usage values_t[0].sum - values_t[1].sum end |
.list ⇒ Object
List all swap devices and returns a Hash.
If the info isn’t available, it will return an empty Hash.
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# File 'lib/linux_stat/swap.rb', line 8 def list return {} unless swaps_readable? file = IO.readlines('/proc/swaps'.freeze).drop(1) file.reduce({}) do |h, x| name, *stats = x.strip.split h.merge!(name => stats.map! { |v| v.to_i.to_s == v ? v.to_i : v.to_sym }) end end |
.percent_available ⇒ Object
Shows the percentage of swap available.
The return type is a Float but if the info isn’t available, it will return nil.
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# File 'lib/linux_stat/swap.rb', line 103 def percent_available return nil unless swaps_readable? values_t = read_usage total = values_t[0].sum return 0.0 if total == 0 total.-(values_t[-1].sum).*(100).fdiv(total).round(2) end |
.percent_used ⇒ Object
Show percentage of swap used.
The return type is a Float but if the info isn’t available, it will return nil.
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# File 'lib/linux_stat/swap.rb', line 89 def percent_used return nil unless swaps_readable? values_t = read_usage total = values_t[0].sum return 0.0 if total == 0 values_t[-1].sum.*(100).fdiv(total).round(2) end |
.stat ⇒ Object
Show aggregated used and available swap.
The values are in kilobytes.
The return type is Hash. If the info isn’t available, the return type is an empty Hash.
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# File 'lib/linux_stat/swap.rb', line 32 def stat return {} unless swaps_readable? values_t = read_usage total, used = values_t[0].sum, values_t[-1].sum available = total - used 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 { total: total, used: used, available: available, percent_used: percent_used, percent_available: percent_available } end |
.total ⇒ Object
Shows total amount of swap.
The value is in kilobytes.
The return type is a Integer but if the info isn’t available, it will return nil.
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# File 'lib/linux_stat/swap.rb', line 57 def total return nil unless swaps_readable? read_usage[0].sum end |
.used ⇒ Object
Show total amount of used swap.
The value is in kilobytes.
The return type is a Integer but if the info isn’t available, it will return nil.
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# File 'lib/linux_stat/swap.rb', line 80 def used return nil unless swaps_readable? read_usage[-1].sum end |