Question

当我在本地计算机上运行这些规范并成功通过时，我正在处理一个具有500多个规范的应用程序。但是当这些规范在CircleCI上运行时，该过程就会被杀死。我试图通过跟踪本地计算机上的内存来调查此问题。当我看到ruby进程占用4gb内存时，我感到很惊讶，这就是触发CircleCI终止进程的原因。

我不确定我的规格记录所有内存的原因我已经在每个规范之后搜索了一个清理内存但没有用的配置。

这是我的rails_helper.rb

require "mongoid-rspec"

require "spec_helper"
ENV["RAILS_ENV"] ||= "test"
require File.expand_path("../../config/environment", __FILE__)
if Rails.env.production?
  abort("The Rails environment is running in production mode!")
end

require "database_cleaner"

require "rspec/rails"

#
Dir[Rails.root.join("spec/support/**/*.rb")].each { |f| require f }

RSpec.configure do |config|
  config.infer_spec_type_from_file_location!

  # FactoryGirl
  config.include FactoryGirl::Syntax::Methods

  # Render
  config.render_views

  # Filter lines from Rails gems in backtraces.
  config.filter_rails_from_backtrace!
  # arbitrary gems may also be filtered via:
  # config.filter_gems_from_backtrace("gem name")
  config.include Mongoid::Matchers, type: :model

  config.include Requests::JSONHelpers, type: :request
  config.include Requests::AuthHelpers, type: :request

  config.include Requests::JSONHelpers, type: :controller
  config.include Requests::AuthHelpers, type: :controller

  config.before(:suite) do
    DatabaseCleaner.orm = "mongoid"
    DatabaseCleaner.strategy = :truncation, { except: %w[roles] }
    DatabaseCleaner.clean_with(:truncation)
    Rails.application.load_seed # loading seeds
  end

  config.around(:each) do |example|
    DatabaseCleaner.cleaning do
      example.run
    end
  end

  config.after(:suite) do
    DatabaseCleaner.strategy = :truncation
    DatabaseCleaner.clean
  end
end

这是我的spec_helper.rb

require "mongoid-rspec"
require "webmock/rspec"
require "pundit/rspec"
require "excon"

WebMock.disable_net_connect!(allow_localhost: true)

RSpec::Matchers.define :match_response_schema do |schema|
  match do
    schema_directory = "#{Dir.pwd}/spec/schemas"
    schema_path = "#{schema_directory}/#{schema}.json"
    JSON::Validator.validate!(schema_path, parsed_json, strict: true)
  end
end
RSpec.configure do |config|
  config.expect_with :rspec do |expectations|
    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
  end

  config.mock_with :rspec do |mocks|
    mocks.verify_partial_doubles = true
  end

  config.shared_context_metadata_behavior = :apply_to_host_groups

  config.include Mongoid::Matchers

  config.before(:all) do
    Excon.defaults[:mock] = true
    Excon.stub({}, body: "{}", status: 200)
  end
end

更新：我在每个例子后用启动垃圾收集器修复它

rails_helper.rb

中的

config.after(:each) do |example|
    GC.start
end

但是，我希望找到比这更好的解决方案

Answer 1

GC.start有帮助的事实表明这不是内存泄漏。也许您有一些古怪的GC设置。如果是这样，请尝试进行一些调整：https://blog.evanweaver.com/2009/04/09/ruby-gc-tuning/

[我在意识到您的问题可能不是那样之前写了内存泄漏搜寻部分，但我将其保留下来，因为它可能对某些人有用]

我要做的是使用ruby-prof运行分析，将其设置为收集内存统计信息

这里是示例

require 'ruby-prof'
RubyProf.measure_mode = RubyProf::ALLOCATIONS

result = RubyProf.profile(:track_allocations => true) do
   100.times { rand(1) ? "*" * rand(100) : 20* rand(100) }  
end  

printer = RubyProf::GraphHtmlPrinter.new(result)
printer.print(File.new("/tmp/report.html", "w+"))

该报告将看起来像这样 [！[在此处输入图片描述] [1]] [1]

所以，您需要做的是这样的：

around(:suite) do |suite|
  require 'ruby-prof'
  RubyProf.measure_mode = RubyProf::ALLOCATIONS

  result = RubyProf.profile(:track_allocations => true) do
   suite.run 
  end

  printer = RubyProf::GraphHtmlPrinter.new(result)
  printer.print(File.new("/tmp/report.html", "w+"))
end

也许您将能够发现哪些对象被过度代表，并且从那里您可能会发现泄漏。试用不同的mearure_mode和打印机，以获得更好的视角。 [1]：https://i.stack.imgur.com/2ZFcO.png

是什么让Rspec占用4GB的内存来运行500个规格？

1 个答案: