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

Instance Method Details

#get_memory ⇒ Object

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



122
123
124
125
126
127
128
129
130
131
 
# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 122

def get_memory
  File.open(proc_status_file, "r") do |f|
    while !f.eof?
      if f.readline =~ /RSS:\s*(\d+) kB/i
        return $1.to_f / 1024.0
      end
    end
  end
  raise "Unable to find RSS in #{proc_status_file}"
end

#proc_status_file ⇒ Object 



132
133
134
 
# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 132

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

#to_s ⇒ Object 



135
136
137
 
# File 'lib/new_relic/agent/samplers/memory_sampler.rb', line 135

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