eric

 > ps auxww | grep timeout-test ; sleep 1 ; ps auxww | grep timeout-test
eric     29741 92.1  5.2  66660 27444 pts/4    R+   20:50   0:38 ruby timeout-test.rb
eric     29741 92.2  5.2  66656 27708 pts/4    R+   20:50   0:39 ruby timeout-test.rb
 > ps auxww | grep timeout-test ; sleep 5 ; ps auxww | grep timeout-test
eric     29741 92.9  5.5  68704 29220 pts/4    R+   20:50   0:45 ruby timeout-test.rb
eric     29741 93.1  5.8  69728 30456 pts/4    R+   20:50   0:50 ruby timeout-test.rb
 > ps auxww | grep timeout-test ; sleep 5 ; ps auxww | grep timeout-test
eric     29741 92.3  5.9  70756 31340 pts/4    R+   20:50   0:53 ruby timeout-test.rb
eric     29741 92.4  6.2  71776 32528 pts/4    R+   20:50   0:58 ruby timeout-test.rb
> ruby -v

eric

class MemoryPrinter < RubyProf::AbstractPrinter
  # Print a flat profile report to the provided output.
  # 
  # output - Any IO oject, including STDOUT or a file. 
  # The default value is STDOUT.
  # 
  # options - Hash of print options.  See #setup_options 
  #           for more information.
  #
  def print(output = STDOUT, options = {})

eric

Thread ID: 9261400
Total: 250423 Kb

    self       calls  name
   55060 Kb   215738  God::Logger#log
                       via Object#applog
   54357 Kb   431476  String#%
                       via God::Logger#log
   28095 Kb   359580  <Class::Time>#allocate
                       via <Class::Time>#now

eric

# NewRelic instrumentation for ThinkingSphinx
if defined? ActiveRecord
  ActiveRecord::Base.class_eval do
    class << self
      add_method_tracer :search, 'ActiveRecord/#{self.name}/search'
      add_method_tracer :search, 'ActiveRecord/search', :push_scope => false
      add_method_tracer :search, 'ActiveRecord/all', :push_scope => false

      add_method_tracer :search_count, 'ActiveRecord/#{self.name}/search_count'
      add_method_tracer :search_count, 'ActiveRecord/search_count', :push_scope => false

eric

WATCHERS = 10

# Make sure pid directories exists
FileUtils.mkdir_p '/tmp/profiler-pids'

God.pid_file_directory = '/tmp/profiler-pids'
God::Logger.syslog = false

WATCHERS.times do |i|
  God.watch do |w|

eric

Displaying top 20 most common line/class pairs
109371 total objects
109371 filled heap slots
114325 free heap slots
   3572 /usr/lib/ruby/site_ruby/1.8/rubygems/specification.rb:186:String
   3053 __null__:__null__:__node__
   1265 /usr/lib/ruby/1.8/x86_64-linux/openssl.so:__null__:__node__
   1248 /usr/lib/ruby/gems/1.8/specifications/passenger-2.2.5.gemspec:15:String
    570 (eval):4:__node__
    448 /usr/lib/ruby/1.8/fileutils.rb:1578:__node__

eric

CRYPT [93 : 0] eric@kibo:/home/eric/god-memory-testing > pprof --text /usr/bin/ruby god-2.hprof.0004.heap
Total: 7.9 MB
     5.3  66.7%  66.7%      5.3  66.7% add_heap
     2.0  24.9%  91.5%      2.0  24.9% ruby_xmalloc
     0.3   3.6%  95.1%      0.3   3.6% ruby_re_compile_pattern
     0.3   3.2%  98.3%      0.3   3.3% ruby_xrealloc
     0.0   0.6%  98.8%      0.0   0.6% rb_thread_save_context
     0.0   0.5%  99.4%      0.0   0.5% CRYPTO_malloc
     0.0   0.3%  99.7%      0.0   0.3% _dl_new_object
     0.0   0.1%  99.8%      0.0   0.1% CRYPTO_realloc

eric

CRYPT [99 : 0] eric@kibo:/home/eric/god-memory-testing > pprof --text /usr/bin/ruby --base=god-3.hprof.0001.heap god-3.hprof.0002.heap
Total: 1.4 MB
     1.0  72.0%  72.0%      1.0  72.0% ruby_xmalloc
     0.4  26.5%  98.5%      0.4  27.6% ruby_xrealloc
     0.0   1.6% 100.1%      0.0   1.6% rb_thread_save_context
     0.0   0.4% 100.4%      0.0   0.4% ruby_re_copy_registers
     0.0   0.0% 100.4%      0.0   0.1% sym_inspect
     0.0   0.0% 100.4%      0.1   3.7% rb_obj_alloc
     0.0   0.0% 100.4%      0.0   0.0% rb_define_class_id
     0.0   0.0% 100.4%      0.9  62.9% all_iter_i

eric

$null = File.open('/dev/null', 'w')

threads     = []
max_threads = 5000

loop do
  threads << Thread.new do
    str = 'x' * 500
    $null.write(str)
  end

eric

require 'open3'

module ShellJob
  @queue = :default

  def self.perform(*args)
    puts "$ #{args.join(' ')}"
    Open3.popen3(*args) do |stdin, stdout, stderr|
      puts stdout.read.inspect
    end