Class: ElasticAPM::Metrics::CpuMemSet::Linux::Meminfo Private

Inherits:
Object
  • Object
show all
Defined in:
lib/elastic_apm/metrics/cpu_mem_set.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#available ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/elastic_apm/metrics/cpu_mem_set.rb', line 216

def available
  @available
end

#page_size ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/elastic_apm/metrics/cpu_mem_set.rb', line 216

def page_size
  @page_size
end

#total ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/elastic_apm/metrics/cpu_mem_set.rb', line 216

def total
  @total
end

Instance Method Details

#read! ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

rubocop:disable Metrics/PerceivedComplexity rubocop:disable Metrics/CyclomaticComplexity



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# File 'lib/elastic_apm/metrics/cpu_mem_set.rb', line 220

def read!
  # rubocop:disable Style/RescueModifier
  @page_size = `getconf PAGESIZE`.chomp.to_i rescue 4096
  # rubocop:enable Style/RescueModifier

  info =
    IO.readlines('/proc/meminfo')
      .lazy
      .each_with_object({}) do |line, hsh|
        if line.start_with?('MemTotal:')
          hsh[:total] = line.split[1].to_i * 1024
        elsif line.start_with?('MemAvailable:')
          hsh[:available] = line.split[1].to_i * 1024
        elsif line.start_with?('MemFree:')
          hsh[:free] = line.split[1].to_i * 1024
        elsif line.start_with?('Buffers:')
          hsh[:buffers] = line.split[1].to_i * 1024
        elsif line.start_with?('Cached:')
          hsh[:cached] = line.split[1].to_i * 1024
        end

        break hsh if hsh[:total] && hsh[:available]
      end

  @total = info[:total]
  @available =
    info[:available] || info[:free] + info[:buffers] + info[:cached]

  self
end