Configuring connection_pool_size in Nginx

Introduction to connection_pool_size in Nginx

In this article, we will explore the concept of connection_pool_size in the ngx_http_core_module in Nginx. Initially, Nginx is one of the most popular web servers in the world, recognized for its high performance and security. When we discuss connection management in Nginx, the concept of connection_pool_size is considered a fundamental feature.

The volume of existing connections in Nginx can significantly impact the performance of your website. Simply put, connection_pool_size defines the number of connections that Nginx can manage simultaneously, which can determine how efficiently your server handles traffic. If this value is not appropriately configured, it may lead to issues in maintaining the demands of your website's traffic.

In fact, by utilizing connection_pool_size, Nginx can optimize connections and manage server resources in the best possible manner. This feature is especially beneficial in servers that can manage a large number of connections over a prolonged period, significantly enhancing performance. Therefore, in this article, we will discuss how you can perform these configurations and identify the relevant parameters.

Before starting, it is essential to note that determining the correct value for connection_pool_size depends on the type of traffic and the number of concurrent connections. Here, we will see how we can configure this feature in an Nginx server and also explore the best practices.

Example configuration of connection_pool_size

http {
    connection_pool_size 100;
}

Code explanation