为什么我的 Rails 网站上的第一页加载速度比后续加载慢？

问题描述 投票：0回答：1

我有一个 Rails 站点，托管在 DigitalOcean Droplet 上，并部署了 dokku 和 herokusih。一切似乎都运行得很好，并且该网站通常运行得相当快（在两个页面之间单击几乎是即时的）。

但是，我在网站上加载的第一个页面总是需要很长时间（我想说大约 2-5 秒）。再次强调，在此之后，所有内容都会快速加载。这种情况不仅仅发生在主页上，会话中首先加载的页面都很慢，然后它们都加载得很快。一旦我开始一个会话，即使我在不同的设备上打开该网站，该网站也会感觉很快（即时或不到 1 秒）。该网站流量不大，但我想知道为什么首页加载速度很慢。

什么可能导致首次点击缓慢，我如何才能准确诊断？

我怀疑站点 ID 可能会以某种方式“休眠”并在第一次加载时启动。但我不知道已经这样设置了，也不知道如何验证这一点。

软件版本：

  • Rails 7.0.5
  • dokku版本0.31.0

最新的dokku部署日志：

Enumerating objects: 9, done.
Counting objects: 100% (9/9), done.
Delta compression using up to 8 threads
Compressing objects: 100% (5/5), done.
Writing objects: 100% (5/5), 501 bytes | 501.00 KiB/s, done.
Total 5 (delta 4), reused 0 (delta 0), pack-reused 0
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       I, [2023-08-20T17:14:24.838894 #906]  INFO -- : Writing /tmp/build/public/assets/activestorage.esm-01f58a45d77495cdfbdfcc872902a430426c4391634ec9c3da5f69fbf8418492.js
       I, [2023-08-20T17:14:24.839679 #906]  INFO -- : Writing /tmp/build/public/assets/activestorage.esm-01f58a45d77495cdfbdfcc872902a430426c4391634ec9c3da5f69fbf8418492.js.gz
       I, [2023-08-20T17:14:24.841459 #906]  INFO -- : Writing /tmp/build/public/assets/actioncable-5433453f9b6619a9de91aaab2d7fc7ff183e5260c0107cbc9a1aa0c838d9a74e.js
       I, [2023-08-20T17:14:24.847290 #906]  INFO -- : Writing /tmp/build/public/assets/actioncable-5433453f9b6619a9de91aaab2d7fc7ff183e5260c0107cbc9a1aa0c838d9a74e.js.gz
       I, [2023-08-20T17:14:24.850970 #906]  INFO -- : Writing /tmp/build/public/assets/actioncable.esm-e01089c3ec4fe7817fa9abcad06cab6bdc387f95f0ca6aab4bf7ba7537f70690.js
       I, [2023-08-20T17:14:24.852670 #906]  INFO -- : Writing /tmp/build/public/assets/actioncable.esm-e01089c3ec4fe7817fa9abcad06cab6bdc387f95f0ca6aab4bf7ba7537f70690.js.gz
       Asset precompilation completed (4.28s)
       Cleaning assets
       Running: rake assets:clean
-----> Detecting rails configuration
       
       
-----> Discovering process types
       Procfile declares types -> web
-----> Releasing poste...
-----> Checking for predeploy task
       No predeploy task found, skipping
-----> Checking for release task
       No release task found, skipping
=====> Processing deployment checks
       No CHECKS file found. Simple container checks will be performed.
       For more efficient zero downtime deployments, create a CHECKS file. See https://dokku.com/docs/deployment/zero-downtime-deploys/ for examples
-----> Deploying poste via the docker-local scheduler...
-----> Deploying web (count=1)
       Attempting pre-flight checks (web.1)
-----> Executing 1 healthchecks                                                        
       Running healthcheck name='web check' delay=0 path='/health/check' retries=5 timeout=5 type='path'
       Healthcheck succeeded name='web check'                                          
       All checks successful (web.1)
=====> Start of poste container output (web.1)
       Puma starting in single mode...
       * Puma version: 5.6.5 (ruby 3.2.2-p53) ("Birdie's Version")
       *  Min threads: 5
       *  Max threads: 5
       *  Environment: production
       *          PID: 12
       * Listening on http://0.0.0.0:5000
       Use Ctrl-C to stop
       I, [2023-08-20T17:15:23.793842 #12]  INFO -- : [e7dd50f0-3c32-4b25-8042-91fcdcd291ff] Started GET "/health/check" for 172.17.0.1 at 2023-08-20 17:15:23 +0000
       I, [2023-08-20T17:15:23.814752 #12]  INFO -- : [e7dd50f0-3c32-4b25-8042-91fcdcd291ff] Processing by ApplicationController#health_check as */*
       I, [2023-08-20T17:15:23.822655 #12]  INFO -- : [e7dd50f0-3c32-4b25-8042-91fcdcd291ff]   Rendered text template (Duration: 0.0ms | Allocations: 7)
       I, [2023-08-20T17:15:23.823900 #12]  INFO -- : [e7dd50f0-3c32-4b25-8042-91fcdcd291ff] Completed 200 OK in 8ms (Views: 7.0ms | Allocations: 723)
=====> End of poste container output (web.1)
       Scheduling old container shutdown in 60 seconds (web.1)
=====> Triggering early nginx proxy rebuild
-----> Ensuring network configuration is in sync for poste
-----> Configuring poste.pt...(using built-in template)
-----> Configuring www.poste.pt...(using built-in template)
-----> Creating https nginx.conf
       Enabling HSTS
       Reloading nginx
-----> Running post-deploy
-----> Ensuring network configuration is in sync for poste
-----> Configuring poste.pt...(using built-in template)
-----> Configuring www.poste.pt...(using built-in template)
-----> Creating https nginx.conf
       Enabling HSTS
       Reloading nginx
-----> Renaming containers
       Found previous container(s) (ce968cd29148) named poste.web.1
       Renaming container (ce968cd29148) poste.web.1 to poste.web.1.1692551740
       Renaming container poste.web.1.upcoming-21322 (34dcbd0190c0) to poste.web.1
-----> Checking for postdeploy task
-----> Executing postdeploy task from app.json: bundle exec rake db:migrate
=====> Start of poste postdeploy task (247dfb42b) output
=====> End of poste postdeploy task (247dfb42b) output
-----> Updated schedule file
-----> Shutting down old containers in 60 seconds
=====> Application deployed:
       http://poste.pt
       https://poste.pt
       https://www.poste.pt
       http://www.poste.pt

@exception_thron — 请参阅上面的 DO 使用图表。如果我缩小到 6 小时或 24 小时图表，基本上相同的上涨/下跌模式会不断重复

ruby-on-rails docker digital-ocean vps dokku
1个回答
0
投票

应用程序在第一页加载时启动，通常运行诸如将 ruby gem 加载到内存中甚至预编译资产之类的东西。

您可以将运行状况检查设置为通常较慢的页面，这会预热应用程序的缓存。

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