Nginx vs Apache – Which Web Server Should You Use on a VPS?

Nginx and Apache are two of the most popular open-source servers, yet they work very differently under the hood. Which web server to install on a new VPS: Nginx vs Apache, is a critical decision. The choice affects site speed, resource use, and application compatibility. For instance, with full root access on HostSailor’s KVM VPS NVMe servers, you have the freedom to run either server or both, depending on your needs. This guide breaks down their architectures, performance, and configuration flexibility on a VPS. So, let’s take a closer look at this web server comparison to understand how each option performs in real-world scenarios.

Nginx

Nginx (pronounced “engine X”) is a high-performance HTTP web server and reverse proxy. It uses an asynchronous event-driven architecture, so each worker process can handle thousands of simultaneous connections with minimal memory overhead. The design makes Nginx especially good at serving static assets quickly and handling high concurrency.

Apache

Apache HTTP Server (or Apache) is a free, open-source web server first released in 1995. It uses a process- or thread-based model via configurable MPM modules. Apache can serve static and dynamic content natively (for example, via mod_php for PHP) and supports .htaccess files for per-directory overrides, giving it an extensive module ecosystem.

How Nginx and Apache Handle Requests Differently?

Apache's Process-Based Architecture

Apache is based on conventional multi-processing. With the common prefork MPM, the server pools several processes, each of which serves a single connection. Both the worker and event MPMs utilize threads in every process, but they continue to allocate resources to each connection. 

As an illustration, in the pre-fork mode, every process has its own memory space, a limiting factor to scalability. The Apache processes could also have language interpreters (such as PHP) embedded into them, thus dynamic requests are handled in-process.

Nginx's Event-Driven Architecture

Nginx was developed to support thousands of parallel connections. It involves an event-based model, which is asynchronous: one master process and several worker processes. Every worker can execute an event loop and deal with a large number of connections in a non-blocking manner. 

Instead of assigning a thread to each request, Nginx puts all clients in an event queue. When data arrives or a connection closes, the worker processes the event and responds. It implies that Nginx does not create a new process whenever a connection is made; both memory and CPU consumption are relatively fixed even during periods of heavy traffic.

Why Architecture Matters on a VPS?

On a VPS, RAM and CPU are finite resources. Nginx’s lightweight event loop uses far less memory per connection than Apache’s process-per-connection model. When compared to benchmarks, the amount of memory and CPU used by Nginx remains constant with increased traffic. However, with Apache, the amount of memory and CPU used increases with the addition of each additional process or thread. 

It typically implies that in small VPS machines, Nginx is able to handle more traffic without resource usage. Scalability of Apache is also possible (at least with the event MPM in the latest versions), and the overhead of an additional process is still present. Simply put, Nginx is usually more concurrently scalable on small to medium VPS instances compared to Apache, which is more flexible at the price of greater memory per connection.

Nginx vs Apache Performance Comparison

Static Content Delivery 

Nginx has an obvious advantage when it comes to the serving of static files (images, CSS, HTML, etc.). It can serve static content with high speed due to its event-driven design and good utilization of kernel capabilities such as sendfile. Nginx also does not have to check filesystems per-request (e.g., it does not have to read .htaccess files), hence its overhead is low. Practically, it is generally used to provide lower latency and high throughput of the static resources as compared to Apache. Apache can serve static files (through its normal file-serving modules); however, at high concurrency, it may initiate additional processes/threads.

Dynamic Content Processing

When using dynamic pages (e.g., PHP scripts or other server-side code), there is a lesser difference in performance. Apache can process dynamic content in-process by loading a language module (such as PHP with mod_php). It implies that Apache handles PHP directly within its worker processes. Nginx is not a dynamically executable code; however, it has to redirect (reverse-proxy) such requests to an external process such as PHP-FPM or FastCGI.

That adds a bit of overhead, though Nginx's effectiveness tends to offset it. More recent versions of Apache (2.4+) have become much faster (particularly the event MPM), and are thus comparable to many dynamic workloads. In real-world tests, optimized Apache can achieve the same PHP page throughput as Nginx, but Nginx remains much more efficient in terms of overall resource consumption (particularly at very high loads).

Memory Usage Under Load

Under heavy load, memory usage becomes a key factor. Nginx’s workers consume a small, nearly fixed amount of RAM no matter how many connections are open. Apache, on the other hand, creates new processes (or threads) as needed, each taking additional memory. 

In prefork mode, that means roughly one process per connection, leading to much higher RAM use at peak traffic. Even with the worker/event MPMs (which use fewer processes with many threads), Apache’s memory usage still rises with each new thread. In short, Nginx’s memory footprint stays low and steady under load, whereas Apache’s grows with concurrency.

Concurrent Connection Handling

Nginx is superior to Apache when there are a large number of users at the same time. Each Nginx worker is capable of supporting thousands of connections by constantly looping through its event queue. The concurrency of Apache is essentially constrained by the number of processes or threads that it can create (or is set to create). 

The number of raw connections per worker is limited only under heavy tuning by even the event MPM of Apache. In self-tests, Nginx can always serve a significantly higher number of simultaneous connections with reduced latency. In other words, Nginx scales to high concurrency with much lower resource use than Apache in typical setups.

Nginx vs Apache: Side-by-Side Comparison Table

 

Configuration and Flexibility of Both Web Servers

Apache's .htaccess and Per-Directory Control

Apache has long supported per-directory overrides via .htaccess files. On enabling, Apache searches each directory of the requested path in search of an .htaccess file, and executes its instructions dynamically. This enables the site owners or developers to modify rewrite rules, security configurations, and access controls without modifying the server's main config. 

It’s especially useful in shared hosting or multi-user environments: each user can manage their own .htaccess without root access. The trade-off is performance: checking .htaccess files on every request adds overhead. For this reason, many high-performance environments disable .htaccess checking and require all rules in the central config.

Nginx's Centralized Configuration

By design, Nginx has no .htaccess or per-directory overrides. All configuration must be placed in the main Nginx config file (usually /etc/nginx/nginx.conf or included files). This means making changes requires editing the central config and reloading Nginx (which can be done gracefully without dropping existing connections). 

The advantage is speed: Nginx doesn’t waste time searching for directives in every folder on each request. The downside is that non-admin users cannot deploy their own rules. In VPS setups, though, administrators have root access and can structure the central config as needed.

Module Ecosystem and Extensibility

Apache’s module ecosystem is vast and mature. The core distribution, plus many third parties, maintains hundreds of modules for SSL, caching, authentication, language runtimes, and more. A majority of the Apache modules are dynamically enabled or disabled in the config. 

Nginx is also modular (some of these are built in, some are third parties), but in earlier times, you had to rebuild them into the binary. Dynamic loading of modules was added since Nginx 1.9.11 (Feb 2016), although a fixed set of compiled modules is still commonly used in Nginx installations. 

When .htaccess Still Matters?

.htaccess files matter mainly in legacy or multi-tenant setups. If you have existing Apache sites with numerous .htaccess rules (common in WordPress, Drupal, Joomla, or custom CMS applications), sticking with Apache can save the effort of rewriting them. It also matters if you allow non-admin users to manage URL rewrites themselves. In most modern VPS scenarios (with full root), per-directory .htaccess is less critical: developers can edit the main config. You can often convert an .htaccess rewrite into an Nginx rewrite directive or a server block, achieving the same ends. In summary, use Apache if .htaccess flexibility is truly required; otherwise, Nginx’s centralized model is fine (and faster).

Which Web Server Should You Choose?

Nginx is the better choice for most modern VPS workloads, while Apache remains the stronger option for legacy applications and .htaccess-dependent setups.

Choose Nginx if you are:

• A developer running APIs, microservices, or Docker-based apps

• Managing a high-traffic website or SaaS platform

• Optimizing for performance and low resource usage

Choose Apache if you are:

• Running a WordPress or CMS site relying on .htaccess

• Migrating from shared hosting environments

• Using legacy PHP applications with module dependencies

Choose a hybrid (Nginx + Apache) if you are:

• Running production workloads that need both performance and flexibility

• Handling mixed traffic (static + dynamic)

Nginx + Apache Hybrid

A hybrid system is the way to go. Install Nginx before port 80/443 and provide the static content and proxy PHP requests to Apache (on a different port). It allows Nginx to support high concurrency and caching, and Apache to support legacy applications and respect .htaccess rules.

Best Server for WordPress on a VPS

WordPress runs on PHP and MySQL, so that both servers can serve it. The traditional option (the LAMP stack) is Apache, and most WordPress extensions assume the use of .htaccess to make redirects and security configurations. In case you are moving an existing WordPress site off shared hosting, the Apache might have fewer changes. 

Nonetheless, Nginx is commonly utilized with WordPress as well (typically in conjunction with PHP-FPM and a minor amount of additional configuration). Nginx can significantly speed up static asset delivery and handle traffic spikes better. 

Most current WordPress VPS configurations are Nginx caching and front-end, and Apache or PHP-FPM on the back end to serve the dynamic pages. It is possible to use either one, although Apache is better when you need .htaccess extensions, and Nginx is the fastest and most efficient.

Running Nginx or Apache on a KVM VPS

1. SSH into your VPS: Use SSH to log in to your HostSailor KVM VPS with root or sudo privileges.

2. Update the OS and install the server: Update your package index (apt update or yum update) and then install your chosen server (e.g., nginx or apache2/httpd). Full root access makes this straightforward.

3. Enable and start the service: Use systemctl enable --now nginx or apache2 to have the server start on boot. Verify it’s listening on port 80 (and 443 for HTTPS).

4. Configure your virtual host: Place your site files in the webroot (e.g.,/var/www/html) and edit the server’s config (Nginx’s server { ... } block or Apache’s <VirtualHost>). For example, add a server block in Nginx or a <VirtualHost> file in Apache. Reload Nginx with nginx -s reload or restart Apache to apply changes.

5. Test your setup: Point your domain’s DNS to the VPS or use curl to fetch your site over HTTP. Adjust any firewall or port rules if necessary. Once your site loads, the server is up and running on HostSailor’s NVMe VPS.

For detailed guidance, see our blog posts on setting up a VPS server and securing a VPS server.

The Bottom Line

In conclusion, Nginx vs Apache ends up like this: for modern VPS workloads, Nginx is often the default for speed and efficiency, while Apache remains useful for legacy or highly configurable setups. You can also combine both: for example, run Nginx as a frontend proxy to Apache to leverage each server’s strengths. Both are fully supported on a VPS. 

Ready to deploy your ideal web server setup? Get full control, NVMe speed, and zero restrictions with Hostsailor’s KVM VPS. Whether you choose Nginx, Apache, or both, you’ll have the flexibility to run your stack your way.

Frequently Asked Questions About Nginx vs Apache

What Is the Main Difference Between Nginx and Apache?

Nginx uses an event-driven system to handle many connections efficiently. Apache uses a process-based model where each request gets its own process.

Which Is Faster — Nginx or Apache?

Nginx is generally faster for static content and high-concurrency traffic because it uses an event-driven architecture. Apache performs similarly for dynamic content when properly configured, but consumes more resources under load.

Is Nginx Better for WordPress?

Nginx can offer better performance for WordPress, especially when paired with PHP-FPM and caching. However, Apache is often easier to use because many WordPress plugins rely on .htaccess rules. The best choice depends on whether you prioritize performance or compatibility.

Can I Run Nginx and Apache on the Same Server?

Yes, running Nginx and Apache together is a common and effective setup. Nginx typically acts as a reverse proxy, handling incoming traffic and static content. Apache processes dynamic requests in the backend, combining performance with flexibility.

Which Web Server Should I Use on a VPS?

You should use Nginx if performance, scalability, and low resource usage are your top priorities. Apache is better suited for legacy applications or setups that depend on .htaccess and module flexibility. Many production environments use both together for a balanced approach.

What Is Nginx Used for as a Reverse Proxy?

As a reverse proxy, Nginx sits in front of backend servers and manages incoming traffic efficiently. It distributes requests, serves static files, and forwards dynamic requests to application servers like Apache or PHP-FPM. This setup improves performance, scalability, and security.