readme.md

Dump Allocations

This creats a flat text file of the allocations dump from ruby prof

Dump Heap File

This dumps all of the tract object allocations from ObjectSpace

Memory Profile

Wrapper to output file with pretty print of https://github.com/SamSaffron/memory_profiler

OOM_helpers.rb

module LeakHelpers
  def self.dump_heap_file
    require 'objspace'
    ObjectSpace.trace_object_allocations_start
    yield
  ensure
    io=File.open("./#{Time.now.strftime("%H.%M.%S")}_heap_dump", "w")
    ObjectSpace.dump_all(output: io); 
    io.close
  end

  def self.dump_allocations
    require 'ruby-prof'
    RubyProf.measure_mode = RubyProf::ALLOCATIONS
    result = RubyProf.profile do
      yield
    end
  ensure
    io=File.open("./#{Time.now.strftime("%H.%M.%S")}_allocations_dump", "w")
    flat_printer = RubyProf::FlatPrinter.new(result)
    flat_printer.print(STDOUT, :min_percent => 2)
    io.close
  end

  def self.memory_profile
    require 'memory_profiler'
    report = MemoryProfiler.report do
      yield
    end
    io=File.open("./#{Time.now.strftime("%H.%M.%S")}_memory_profile", "w")
    io.puts report.pretty_print
    io.close
  end
end