Class: NewRelic::Agent::Samplers::MemorySampler

Inherits:
NewRelic::Agent::Sampler show all
Defined in:
lib/new_relic/agent/samplers/memory_sampler.rb

Defined Under Namespace

Classes: Base, JavaHeapSampler, ProcStatus, ShellPS

Instance Attribute Summary collapse

Attributes inherited from NewRelic::Agent::Sampler

#id

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from NewRelic::Agent::Sampler

enabled?, inherited, named, sampler_classes

Constructor Details

#initialize ⇒ MemorySampler

Returns a new instance of MemorySampler.

Raises:



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# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 16

def initialize
  @sampler = nil

  # macos, linux, solaris
  if defined? JRuby
    @sampler = JavaHeapSampler.new
  elsif platform.include?('linux')
    @sampler = ProcStatus.new
    if !@sampler.can_run?
      ::NewRelic::Agent.logger.debug("Error attempting to use /proc/#{$$}/status file for reading memory. Using ps command instead.")
      @sampler = ShellPS.new('ps -o rsz')
    else
      ::NewRelic::Agent.logger.debug("Using /proc/#{$$}/status for reading process memory.")
    end
  elsif platform.include?('darwin9') # 10.5
    @sampler = ShellPS.new('ps -o rsz')
  elsif /darwin(1|2)\d+/.match?(platform) # >= 10.6
    @sampler = ShellPS.new('ps -o rss')
  elsif platform.include?('freebsd')
    @sampler = ShellPS.new('ps -o rss')
  elsif platform.include?('solaris')
    @sampler = ShellPS.new('/usr/bin/ps -o rss -p')
  end

  raise Unsupported, "Unsupported platform for getting memory: #{platform}" if @sampler.nil?
  raise Unsupported, "Unable to run #{@sampler}" unless @sampler.can_run?
end

Instance Attribute Details

#sampler ⇒ Object

Returns the value of attribute sampler.



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# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 14

def sampler
  @sampler
end

Class Method Details

.platform ⇒ Object 



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# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 48

def self.platform
  if RUBY_PLATFORM.include?('java')
    begin
      NewRelic::Helper.run_command('uname -s').downcase
    rescue NewRelic::CommandRunFailedError, NewRelic::CommandExecutableNotFoundError
      'unknown'
    end
  else
    RUBY_PLATFORM.downcase
  end
end

.supported_on_this_platform? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 44

def self.supported_on_this_platform?
  defined?(JRuby) or platform =~ /linux|darwin|freebsd|solaris/
end

Instance Method Details

#platform ⇒ Object 



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# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 60

def platform
  NewRelic::Agent::Samplers::MemorySampler.platform
end

#poll ⇒ Object 



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# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 64

def poll
  sample = @sampler.get_sample
  if sample
    NewRelic::Agent.record_metric('Memory/Physical', sample)
  end
end