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

Inherits:
Base
  • Object
show all
Defined in:
lib/new_relic/agent/samplers/memory_sampler.rb

Overview

ProcStatus

A class that samples memory by reading the file /proc/$$/status, which is specific to linux

Instance Method Summary collapse

Methods inherited from Base

#can_run?, #get_sample, #initialize

Constructor Details

This class inherits a constructor from NewRelic::Agent::Samplers::MemorySampler::Base

Instance Method Details

#get_memory ⇒ Object

Returns the amount of resident memory this process is using in MB



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# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 142

def get_memory
  proc_status = File.open(proc_status_file, 'r') { |f| f.read_nonblock(4096).strip }
  if proc_status =~ /RSS:\s*(\d+) kB/i
    return $1.to_f / 1024.0
  end

  raise "Unable to find RSS in #{proc_status_file}"
end

#proc_status_file ⇒ Object 



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# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 151

def proc_status_file
  "/proc/#{$$}/status"
end

#to_s ⇒ Object 



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# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 155

def to_s
  "proc status file sampler: #{proc_status_file}"
end