benoittgt

Finding a Ruby memory leak using a time analysis

When developing a program in Ruby, you may sometimes encounter a memory leak. For a while now, Ruby has a facility to gather information about what objects are laying around: ObjectSpace.

There are several approaches one can take to debug a leak. This discusses a time-based approach, where a full memory dump is generated every, say, 5 minutes, during a time that the memory leak is showing up. Afterwards, one can look at all the objects, and find out which ones are staying around, causing the

benoittgt

require 'socket'

@queue = Ractor.new do
  loop do
    Ractor.yield(Ractor.receive, move: true)
  end
end

listener = Ractor.new(@queue) do |queue|
  socket = TCPServer.new(PORT)