nginx.conf

user www-data;

# As a thumb rule: One per CPU. If you are serving a large amount
# of static files, which requires blocking disk reads, you may want
# to increase this from the number of cpu_cores available on your
# system.
#
# The maximum number of connections for Nginx is calculated by:
# max_clients = worker_processes * worker_connections
worker_processes 1;

# Maximum file descriptors that can be opened per process
# This should be > worker_connections
worker_rlimit_nofile 8192;

events {
	# When you need > 8000 * cpu_cores connections, you start optimizing
	# your OS, and this is probably the point at where you hire people
	# who are smarter than you, this is *a lot* of requests.
	worker_connections 8000;
}

error_log /var/log/nginx/error.log;

pid /var/run/nginx.pid;

http {
	charset utf-8;

	# Set the mime-types via the mime.types external file
	include mime.types;

	# And the fallback mime-type
	default_type application/octet-stream;

	# Click tracking!
	access_log /var/log/nginx/access.log;

	# Hide nginx version
	server_tokens off;

	# ~2 seconds is often enough for HTML/CSS, but connections in
	# Nginx are cheap, so generally it's safe to increase it
	keepalive_timeout 20;

	# You usually want to serve static files with Nginx
	sendfile on;

	tcp_nopush on; # off may be better for Comet/long-poll stuff
	tcp_nodelay off; # on may be better for Comet/long-poll stuff

	server_name_in_redirect off;
	types_hash_max_size 2048;

	gzip on;
	gzip_http_version 1.0;
	gzip_comp_level 5;
	gzip_min_length 512;
	gzip_buffers 4 8k;
	gzip_proxied any;
	gzip_types
		# text/html is always compressed by HttpGzipModule
		text/css
		text/plain
		text/x-component
		application/javascript
		application/json
		application/xml
		application/xhtml+xml
		application/x-font-ttf
		application/x-font-opentype
		application/vnd.ms-fontobject
		image/svg+xml
		image/x-icon;

	# This should be turned on if you are going to have pre-compressed copies (.gz) of
	# static files available. If not it should be left off as it will cause extra I/O
	# for the check. It would be better to enable this in a location {} block for
	# a specific directory:
	# gzip_static on;

	gzip_disable "msie6";
	gzip_vary on;
	
	# Upstream to abstract backend connection(s) for PHP
	upstream php {
		server unix:/tmp/php5-fpm.sock;
	}

	include /etc/nginx/conf.d/*.conf;
	include /etc/nginx/sites-enabled/*;
}