轨。第一次请求太慢，超时，下一次要求更快

时间：2017-08-25 13:15:46

标签： ruby caching heroku ruby-on-rails-5 asset-pipeline

我正在开发一个rails应用程序。在没有问题的情况下在Heroku上推送git后，该应用程序显示错误＆＃34;请求超时＆＃34;在webbrowser里面。

如果我在1分钟后重新尝试，应用程序会在网页浏览器上非常快速地显示页面。

配置

在下方查找我的配置

  • Rails 5.1.2

  • psql（PostgreSQL）9.6.1

gem文件中的主要信息：

ruby '2.2.6'

gem 'rails', '~> 5.1.1'

gem 'pg', '~> 0.18'

gem 'puma', '~> 3.7'

的Heroku 

Standard-2X dynos, Shared, 1 GB RAM

Heroku Postgres :: Brown

Memcached Cloud :free

Papertrail :free

STANDARD PLAN

LOG

第一个非常长的请求的日志（请注意我在测试之前重新启动服务器以重现每天早上第一次请求时附加的问题）

Aug 25 03:28:15 myapplication app/web.1:  => Booting Puma 
Aug 25 03:28:15 myapplication app/web.1:  => Rails 5.1.2 application starting in production on http://0.0.0.0:41080 
Aug 25 03:28:15 myapplication app/web.1:  => Run `rails server -h` for more startup options 
Aug 25 03:28:15 myapplication app/web.1:  [4] Puma starting in cluster mode... 
Aug 25 03:28:15 myapplication app/web.1:  [4] * Version 3.9.1 (ruby 2.2.6-p396), codename: Private Caller 
Aug 25 03:28:15 myapplication app/web.1:  [4] * Min threads: 5, max threads: 5 
Aug 25 03:28:15 myapplication app/web.1:  [4] * Environment: production 
Aug 25 03:28:15 myapplication app/web.1:  [4] * Process workers: 2 
Aug 25 03:28:15 myapplication app/web.1:  [4] * Preloading application 
Aug 25 03:28:15 myapplication app/web.1:  [4] * Listening on tcp://0.0.0.0:41080 
Aug 25 03:28:15 myapplication app/web.1:  [4] Use Ctrl-C to stop 
Aug 25 03:28:15 myapplication app/web.1:  [4] - Worker 0 (pid: 6) booted, phase: 0 
Aug 25 03:28:15 myapplication app/web.1:  [4] - Worker 1 (pid: 19) booted, phase: 0 
Aug 25 03:28:15 myapplication heroku/web.1:  State changed from starting to up 
Aug 25 03:28:37 myapplication app/heroku-postgres:  source=HEROKU_POSTGRESQL_BROWN sample#current_transaction=2339 sample#db_size=25066008bytes sample#tables=21 sample#active-connections=2 sample#waiting-connections=0 sample#index-cache-hit-rate=0.99931 sample#table-cache-hit-rate=0.996 sample#load-avg-1m=0 sample#load-avg-5m=0 sample#load-avg-15m=0 sample#read-iops=0 sample#write-iops=0.057733 sample#memory-total=4044984kB sample#memory-free=1550168kB sample#memory-cached=1945532kB sample#memory-postgres=16880kB 
Aug 25 03:30:38 myapplication app/heroku-postgres:  source=HEROKU_POSTGRESQL_BROWN sample#current_transaction=2339 sample#db_size=25066008bytes sample#tables=21 sample#active-connections=2 sample#waiting-connections=0 sample#index-cache-hit-rate=0.99931 sample#table-cache-hit-rate=0.996 sample#load-avg-1m=0 sample#load-avg-5m=0 sample#load-avg-15m=0 sample#read-iops=0 sample#write-iops=0.029687 sample#memory-total=4044984kB sample#memory-free=1550000kB sample#memory-cached=1945544kB sample#memory-postgres=16880kB 
Aug 25 03:31:39 myapplication app/heroku-postgres:  source=HEROKU_POSTGRESQL_BROWN sample#current_transaction=2339 sample#db_size=25066008bytes sample#tables=21 sample#active-connections=2 sample#waiting-connections=0 sample#index-cache-hit-rate=0.99931 sample#table-cache-hit-rate=0.996 sample#load-avg-1m=0 sample#load-avg-5m=0 sample#load-avg-15m=0 sample#read-iops=0 sample#write-iops=0.029687 sample#memory-total=4044984kB sample#memory-free=1549940kB sample#memory-cached=1945564kB sample#memory-postgres=16880kB 
Aug 25 03:32:38 myapplication app/heroku-postgres:  source=HEROKU_POSTGRESQL_BROWN sample#current_transaction=2339 sample#db_size=25066008bytes sample#tables=21 sample#active-connections=2 sample#waiting-connections=0 sample#index-cache-hit-rate=0.99931 sample#table-cache-hit-rate=0.996 sample#load-avg-1m=0 sample#load-avg-5m=0 sample#load-avg-15m=0 sample#read-iops=0 sample#write-iops=0.029687 sample#memory-total=4044984kB sample#memory-free=1550284kB sample#memory-cached=1945568kB sample#memory-postgres=16880kB 
Aug 25 03:33:39 myapplication app/heroku-postgres: source=HEROKU_POSTGRESQL_BROWN sample#current_transaction=2339 sample#db_size=25066008bytes sample#tables=21 sample#active-connections=2 sample#waiting-connections=0 sample#index-cache-hit-rate=0.99931 sample#table-cache-hit-rate=0.996 sample#load-avg-1m=0 sample#load-avg-5m=0 sample#load-avg-15m=0 sample#read-iops=0 sample#write-iops=0.030191 sample#memory-total=4044984kB sample#memory-free=1550128kB sample#memory-cached=1945580kB sample#memory-postgres=16880kB 
Aug 25 03:33:51 myapplication heroku/router: at=info method=GET path="/" host=myapplication.herokuapp.com request_id=afa5c118-7319-4b9b-a945-60ed57a63062 fwd="90.87.43.215" dyno=web.1 connect=0ms service=72ms status=301 bytes=371 protocol=https 
Aug 25 03:33:51 myapplication app/web.1: I, [2017-08-25T10:33:50.584824 #19]  INFO -- : [afa5c118-7319-4b9b-a945-60ed57a63062] Started GET "/" for 90.87.43.215 at 2017-08-25 10:33:50 +0000 
Aug 25 03:33:51 myapplication app/web.1: I, [2017-08-25T10:33:50.665212 #19]  INFO -- : [6db31a1a-39a5-4a8f-9ba1-cf35ceae5f61] Started GET "/projets/new" for 90.87.43.215 at 2017-08-25 10:33:50 +0000 
Aug 25 03:33:51 myapplication app/web.1: I, [2017-08-25T10:33:50.670054 #19]  INFO -- : [6db31a1a-39a5-4a8f-9ba1-cf35ceae5f61] Processing by ProjetsController#new as HTML 
Aug 25 03:33:51 myapplication app/web.1: D, [2017-08-25T10:33:50.783930 #19] DEBUG -- : [6db31a1a-39a5-4a8f-9ba1-cf35ceae5f61]   User Load (3.2ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2  [["id", 2], ["LIMIT", 1]] 
Aug 25 03:33:51 myapplication app/web.1: D, [2017-08-25T10:33:50.928475 #19] DEBUG -- : [6db31a1a-39a5-4a8f-9ba1-cf35ceae5f61]   Regleconfiguration Load (3.4ms)  SELECT  "regleconfigurations".* FROM "regleconfigurations" ORDER BY "regleconfigurations"."id" DESC LIMIT $1  [["LIMIT", 1]] 
Aug 25 03:33:51 myapplication app/web.1: D, [2017-08-25T10:33:50.955570 #19] DEBUG -- : [6db31a1a-39a5-4a8f-9ba1-cf35ceae5f61]   Tarifoptionbt Load (3.2ms)  SELECT "tarifoptionbts".* FROM "tarifoptionbts" 
Aug 25 03:33:51 myapplication app/web.1: I, [2017-08-25T10:33:50.989799 #19]  INFO -- : [6db31a1a-39a5-4a8f-9ba1-cf35ceae5f61]   Rendering projets/new.html.erb within layouts/application 
Aug 25 03:34:21 myapplication heroku/router: at=error code=H12 desc="Request timeout" method=GET path="/projets/new" host=myapplication.herokuapp.com request_id=6db31a1a-39a5-4a8f-9ba1-cf35ceae5f61 fwd="90.87.43.215" dyno=web.1 connect=0ms service=30001ms status=503 bytes=0 protocol=https 
Aug 25 03:34:39 myapplication app/heroku-postgres: source=HEROKU_POSTGRESQL_BROWN sample#current_transaction=2339 sample#db_size=25066008bytes sample#tables=21 sample#active-connections=3 sample#waiting-connections=0 sample#index-cache-hit-rate=0.99931 sample#table-cache-hit-rate=0.996 sample#load-avg-1m=0 sample#load-avg-5m=0 sample#load-avg-15m=0 sample#read-iops=0 sample#write-iops=0.029687 sample#memory-total=4044984kB sample#memory-free=1547512kB sample#memory-cached=1945596kB sample#memory-postgres=20036kB 
Aug 25 03:35:37 myapplication app/web.1: I, [2017-08-25T10:35:37.131381 #19]  INFO -- : [6db31a1a-39a5-4a8f-9ba1-cf35ceae5f61]   Rendered projets/_etapebar.html.erb (106132.4ms)

[.....]渲染30局部视图

Aug 25 03:35:38 myapplication app/web.1: I, [2017-08-25T10:35:37.495939 #19]  INFO -- : [6db31a1a-39a5-4a8f-9ba1-cf35ceae5f61] Completed 200 OK in 106826ms (Views: 106499.5ms | ActiveRecord: 50.2ms)

如果我第二次渲染相同的视图，我会得到这个日志：

Aug 25 05:42:45 myapplication app/web.1: I, [2017-08-25T12:42:44.339695 #19]  INFO -- : [9c38a6b8-73d4-4e31-9ac3-df2ec8b21049] Started GET "/projets/new" for 90.87.43.215 at 2017-08-25 12:42:44 +0000 
Aug 25 05:42:45 myapplication app/web.1: I, [2017-08-25T12:42:44.341197 #19]  INFO -- : [9c38a6b8-73d4-4e31-9ac3-df2ec8b21049] Processing by ProjetsController#new as HTML 
Aug 25 05:42:45 myapplication app/web.1: D, [2017-08-25T12:42:44.348612 #19] DEBUG -- : [9c38a6b8-73d4-4e31-9ac3-df2ec8b21049]   User Load (1.7ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2  [["id", 2], ["LIMIT", 1]] 
Aug 25 05:42:45 myapplication app/web.1: I, [2017-08-25T12:42:44.351579 #19]  INFO -- : [9c38a6b8-73d4-4e31-9ac3-df2ec8b21049] Completed 200 OK in 10ms (ActiveRecord: 1.7ms)

应用程序从106秒跳转到第一次请求（创建Heroku错误）到第二次渲染中的非常短的时间

ASSET

日志显示第二个调用从请求中获取资产。

在我的应用程序中，在每个页面上，我加载当前控制器的js：

在application.html.erb

中 
<%= stylesheet_link_tag controller.controller_name if TarifsDynamique::Application.assets.find_asset("#{controller.controller_name}.css") %>
<%= javascript_include_tag params[:controller] if TarifsDynamique::Application.assets.find_asset("#{controller.controller_name}.js") %>

从application.js和.css中删除// = require。

并在asset.rb中添加

 Rails.application.config.assets.precompile += ["#{controller}.js", "#{controller}.css"]

所有控制器。

它的工作找到了（在第一次通话后的开发和生产中）。

但是什么时候，我试着

$Heroku run assets:precompile

我收到了这个错误

Running rake assets:precompile on ⬢ myapplication... up, run.9829 (Standard-1X)
Yarn executable was not detected in the system.
Download Yarn at https://yarnpkg.com/en/docs/install
...

CACHE

我尝试添加缓存以加快第一页的速度

  • 控制器内的缓存操作：

    class ProjetsController < ApplicationController

  caches_action :new, :edit

  • 缓存视图：new.html.erb 

    <%= render 'form', projet: @projet, cached: true %>

  • 在production.rb中的活动缓存

    Rails.application.configure do

    config.cache_classes = true

NO IDEA

我没有更多的想法 如果你有了一个想法，它会非常有用！

感谢。

[编辑] 的解

您好， 我终于找到了正在发生的事情！ 我有50个图像要在资产文件夹中编译。 即使我预先编译它们，在长时间睡眠后的第一次请求中，Rails会再次预编译它们，这需要花费很多时间。

1-我在amason S3上移动图像， 2-将image_tag更改为image_static_tag 3-创建一个image_static_tag帮助程序，用于从s3提供静态文件 4-重新部署应用程序，现在一切正常!!

感谢您的帮助

0 个答案:

没有答案
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