How to test Nginx's high performance

Brief introduction

Nginx ("Engine X") is a high-performance HTTP and reverse proxy server, also a IMAP/POP3/SMTP proxy server;

As a lightweight Web server, with less memory, concurrency and other advantages, is high-connection concurrency scenario Apache Good alternative;

This article mainly introduces Nginx as a Web server, compared to the performance advantages of Apache;

The next article will introduce Nginx as the direction of the proxy server implementation;

Important Features

Non-blocking: During data replication, the first phase of disk I/O is non-blocking;

Event-driven: The communication mechanism uses the EPOLL model to support larger concurrent connections;

Master/worker structure: A master process that generates one or more worker processes;

Infrastructure architecture

How Nginx achieves high concurrency:

The I/O model employs an asynchronous, non-blocking event-driven mechanism that processes multiple prepared events, such as the epoll mechanism, from a process.

The difference between Nginx and Apache for high concurrency processing:

For Apache, each request will have a single worker thread, and when the concurrency increases, it will also produce a large number of worker threads, resulting in a sharp increase in memory consumption, while the context switch of the thread will also lead to higher CPU overhead, resulting in severe performance degradation in high concurrency scenarios;

For Nginx, a worker process has only one main thread, and through event-driven mechanism, it realizes the cyclic processing of multiple prepared events, thus achieving lightweight and high concurrency;

Deployment Configuration

Installation

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