Nginx Performance Updates and Optimization Gzip, Caching, and Worker Tuning

Nginx Performance Updates and Optimization

This guide covers performance updates to make your Nginx + Node.js deployment faster.

1. Update Worker Processes

# /etc/nginx/nginx.conf
worker_processes auto;       # One per CPU core
worker_connections 2048;     # Connections per worker
worker_rlimit_nofile 65535;  # File descriptor limit

2. Enable Gzip Compression

# In http block or server block
gzip on;
gzip_vary on;
gzip_min_length 1000;
gzip_proxied any;
gzip_comp_level 6;
gzip_types
    text/plain
    text/css
    text/xml
    text/javascript
    application/json
    application/javascript
    application/xml
    application/xml+rss
    application/x-javascript;

This reduces response sizes by 60-80% for text-based content.

3. Cache Static Files

server {
    # ...

    # Cache static assets for 1 year
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        access_log off;
    }
}

React build files have hashed names (main.a1b2c3d4.js), so aggressive caching is safe.

4. Proxy Buffering

location /api/ {
    proxy_pass http://localhost:3000;
    
    # Buffer settings
    proxy_buffering on;
    proxy_buffer_size 4k;
    proxy_buffers 8 4k;
    proxy_busy_buffers_size 8k;
    
    # ... other headers ...
}

Buffering lets Nginx collect the full response from Node.js before sending to the client, freeing Node.js to handle other requests.

5. Keep-Alive Connections

# In http block
keepalive_timeout 65;
keepalive_requests 100;

# Upstream keep-alive (to Node.js)
upstream nodejs_backend {
    server 127.0.0.1:3000;
    keepalive 32;
}

server {
    location / {
        proxy_pass http://nodejs_backend;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
    }
}

6. HTTP/2

server {
    listen 443 ssl http2;  # Enable HTTP/2
    # ... SSL config ...
}

HTTP/2 allows multiplexing (multiple requests over one connection) and is faster than HTTP/1.1.

7. Brotli Compression (Better than Gzip)

sudo apt install -y libnginx-mod-http-brotli-filter libnginx-mod-http-brotli-static

brotli on;
brotli_comp_level 6;
brotli_types text/plain text/css application/json application/javascript text/xml;

Brotli is ~15-20% better than gzip for text content.

8. Open File Cache

# In http block
open_file_cache max=1000 inactive=20s;
open_file_cache_valid 30s;
open_file_cache_min_uses 2;
open_file_cache_errors on;

This caches file metadata, reducing disk I/O for frequently accessed files.

9. Update Timeouts

# Client timeouts (prevent slowloris)
client_body_timeout 10;
client_header_timeout 10;
keepalive_timeout 65;
send_timeout 10;

# Proxy timeouts
location /api/ {
    proxy_connect_timeout 5s;
    proxy_send_timeout 30s;
    proxy_read_timeout 30s;
}

10. Disable Access Log for Static Files

location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2)$ {
    access_log off;
    expires 1y;
}

This reduces disk I/O and log file size.

Applying Performance Updates

# 1. Update config
sudo nano /etc/nginx/nginx.conf
sudo nano /etc/nginx/sites-available/devtinder

# 2. Test
sudo nginx -t

# 3. Reload (zero downtime)
sudo systemctl reload nginx

# 4. Verify with performance test
# Use Google PageSpeed Insights: https://pagespeed.web.dev
# Or: curl -I -H "Accept-Encoding: gzip" https://yourdomain.com

The Takeaway

Nginx performance updates include: worker_processes auto with 2048 connections, gzip compression (level 6, text types), static file caching (1 year with immutable), proxy buffering (frees Node.js), keep-alive connections (65s timeout, 32 upstream), HTTP/2 for multiplexing, Brotli compression (better than gzip), open file cache (reduces disk I/O), appropriate timeouts (prevent slowloris), and access_log off for static files. Test with nginx -t and reload.