应用程序控制器中的变量会导致 Rails 中的内存泄漏吗? [英] Will variables in application controller cause a memory leak in Rails?

问题描述

我有一个在 Heroku 上运行的 Rails 应用程序(每天大约 1000 次页面浏览).自上周启动以来，我一直在经历应用程序的频繁崩溃.

I have an application in Rails that I run on Heroku (apprx 1 000 page views a day). I have been experiencing frequent crashes of the application since the launch last week.

查看 New Relic，似乎 Dynos 内存使用量不断增加，而内存使用量从未下降.基本上，它会在几个小时内累积，然后以请求超时结束，这似乎很可能.

Looking into New Relic it seems like the Dynos memory usage is constantly increasing without ever going down in memory usage. Basically, it builds up during a couple of hours and then end in request timeouts, which seems likely.

因此，我认为应用崩溃的问题是由于内存泄漏.

Thus, I believe the problem with the app crashing is due to a memory leak.

我的应用程序 (presenttips . com) 是一个礼物网站，其中包含随机礼物"、每日礼物"和横幅"等功能.这些我像这样加载到应用程序控制器中:

My app (presenttips . com) is a gift website where I have features like "random gift", "gift of the day" and "banners". These I load in the application controller like this:

  before_filter :global_setup

  def global_setup
    # Create random gift
    rand_gift = []
    rand_gift << Gift.where(:gift_status_id => 1) #=> Accepted
    @random_gift = rand_gift[0][rand(rand_gift[0].size) - 1]   
    rand_gift = nil 
    @nbr_of_active_gifts = (Gift.where(:gift_status_id => 1).count / 100 ).round * 100 

    @toplist = Gift.where(:gift_status_id => 1).order("week_click DESC").limit(20)
    @banners = Banner.where("first_date <= '"  + Time.now.to_date.to_s + "'").where("last_date >= '"  + Time.now.to_date.to_s + "'").order("first_date ASC")    
    advertise_here = []
    (@banners.count..4).each do |i|
      advertise_here[i] = Banner.new(:advertiser => "Presenttips.com", :banner_image => "annons.jpg", :url => advertise_path)
    end
    @banners << advertise_here.compact
    @banners = @banners.flatten
    @page_categories = PageCategory.order(:prio_rank)

        if Rails.env.production?
            @random_sql = "RANDOM()"
          @meta_robots_block = false
          @analytics_block = false          
        else 
          @meta_robots_block = true
          @analytics_block = true
            @random_sql = "RAND()"          
        end    


    gift_from_daily = DailyGift.where(:publish_date => Time.now.to_date).first
    gift_from_daily = DailyGift.create(:publish_date => Time.now.to_date, :gift_id => @random_gift.id) if gift_from_daily.blank?
    @daily_gift = Gift.find(gift_from_daily.gift_id)

    @head_categories = Category.order(:name).where(:parent_id => nil)

    todays_date = Time.now.to_date.to_s

    @season = Season.where("'" + todays_date + "' >= date_start ", "'" + todays_date + "' <= date_end" ).first
    @season_theme = @season.css
    @logo = 'logo.png'
    @logo = 'seasons/logo_christmas.png' if @season.css.eql?('theme_christmas.css')
  end

这样我就可以在应用程序中全局使用它们(例如，当天的礼物总是在右栏中显示).

so that I can use them in the app globabally (gift of the day, for example, is always presenet in the right column).

不过，考虑到内存使用情况，我想这不是很好.

I guess this is not great considering memory usage though.

我的问题:

1. 这是否可能导致内存堆积?
2. 在这种情况下，更聪明的方法是什么?

推荐答案

我删除了几乎所有这些变量，但仍然没有帮助.我会假设应用程序控制器没有导致内存问题.

I remove almost all of these variables and it still didn't help. I will assume the application controller was not causing the memory problem.

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