class NewRelic::Agent::Samplers::MemorySampler

Attributes

sampler[RW]

Public Class Methods

new() click to toggle source
# File lib/new_relic/agent/samplers/memory_sampler.rb, line 15
def initialize
  # macos, linux, solaris
  if defined? JRuby
    @sampler = JavaHeapSampler.new
  elsif platform =~ /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 =~ /darwin9/ # 10.5
    @sampler = ShellPS.new("ps -o rsz")
  elsif platform =~ /darwin1\d+/ # >= 10.6
    @sampler = ShellPS.new("ps -o rss")
  elsif platform =~ /freebsd/
    @sampler = ShellPS.new("ps -o rss")
  elsif platform =~ /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
platform() click to toggle source
# File lib/new_relic/agent/samplers/memory_sampler.rb, line 45
def self.platform
  if RUBY_PLATFORM =~ /java/
    %x[uname -s].downcase
  else
    RUBY_PLATFORM.downcase
  end
end
supported_on_this_platform?() click to toggle source
# File lib/new_relic/agent/samplers/memory_sampler.rb, line 41
def self.supported_on_this_platform?
  defined?(JRuby) or platform =~ /linux|darwin|freebsd|solaris/
end

Public Instance Methods

platform() click to toggle source
# File lib/new_relic/agent/samplers/memory_sampler.rb, line 52
def platform
  NewRelic::Agent::Samplers::MemorySampler.platform
end
poll() click to toggle source
# File lib/new_relic/agent/samplers/memory_sampler.rb, line 56
def poll
  sample = @sampler.get_sample
  if sample
    NewRelic::Agent.record_metric("Memory/Physical", sample)
  end
end