denji/nginx-tuning.md Tuning NGINX for Performance Testing the Performance of NGINX and NGINX Plus Web Servers
Optimizing web servers for high throughput and low latency 这个文章不错，覆盖了很多方面的内容。
Optimizing Nginx Configuration For High Loads
1M HTTP Requests per second using Nginx and Ubuntu 12.04 on EC2 这个部分涉及的内容太多，很多后续都涉及到了对网卡的调优上。
