A concise tutorial: How to improve website performance with NGINX and PM2 on VPS

Concise tutorial: How to use NGINX and PM2 on VPS to improve website performance

Introduction:
In the modern network environment, high-performance websites have become User’s pursuit goals. In order to provide better user experience and response speed, we can optimize website performance by using NGINX and PM2. This article will detail how to configure NGINX and PM2 on a VPS and provide specific code examples.

1. Installing and Configuring NGINX
   First, we need to install NGINX on the VPS. Generally speaking, you can install it through package management tools (such as apt, yum, etc.). The following is an example of the command to install NGINX on an Ubuntu system:

   sudo apt update
   sudo apt install nginx

   After the installation is complete, we need to perform some basic configurations on NGINX. It mainly includes listening ports, domain name binding, reverse proxy, etc. The following is an example NGINX configuration file:

   server {
    listen 80;
    server_name your_domain.com;
   
    location / {
        proxy_pass http://localhost:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }
   }

   This configuration file assumes that your website is running on local port 3000. You need to replace "your_domain.com" with your domain name and save the configuration file to the "/etc/nginx/conf.d/your_domain.conf" directory. After the configuration is completed, restart the NGINX service to make the configuration take effect.

2. Installing and configuring PM2
   Next, we will use PM2 to manage the process of the website. PM2 can help us monitor, automatically restart and load balance the website's processes. The following is an example of a command to install PM2 on a VPS:

   sudo npm install -g pm2

   After the installation is complete, use the following command to start a website process:

   pm2 start your_script.js

   This command will start a file named "your_script.js "Website process. You will need to adapt this command to suit your script file path and command.

3. Use the load balancing function of PM2
   In order to further improve the performance of the website, we can use the load balancing function of PM2. Load balancing can distribute requests to multiple website processes to provide higher concurrent processing capabilities. The following is an example of using PM2 load balancing:

   pm2 start your_script.js -i max

   This command will start multiple website processes, where the "-i max" parameter indicates using the maximum number of processes. PM2 will automatically adjust the number of processes based on the number of CPU cores on the server.

4. Monitoring and managing website processes
   PM2 provides some commands to monitor and manage website processes. The following are some commonly used command examples:
5. Monitor the status of the website process: pm2 status
6. Monitor the resource usage of the website process: pm2 monit
7. Stop a website process: pm2 stop your_script.js
8. Restart a website process: pm2 restart your_script.js

Summary:
By using NGINX and PM2, we can optimize the performance of the website on VPS. NGINX can be used as a reverse proxy server to improve the response speed of the website by configuring a reverse proxy. PM2 can help us manage and monitor the process of the website and provide better concurrent processing capabilities through load balancing. I hope this article will be helpful to developers who need to improve website performance on VPS.

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