proxy_cache ramdisk

AMP Admin admin at
Mon Feb 1 19:00:21 MSK 2010

-----Original Message-----
From: Ryan Malayter [mailto:malayter at] 
Sent: Monday, February 01, 2010 8:14 AM
To: nginx at
Subject: Re: proxy_cache ramdisk

On Sun, Jan 31, 2010 at 9:12 PM, quan nexthop <quan.nexthop at> wrote:
> Could you please share us your configuration ?

The basics of tmpfs are here:

Here's my config with most comments and white-space trimmed out:
worker_processes  4;
error_log  /var/log/nginx/error.log;
pid        /var/run/;

events {
    worker_connections  1024;

http {
    include       /etc/nginx/mime.types;
    access_log  /var/log/nginx/access.log;
    sendfile        on;
    keepalive_timeout  65;
    tcp_nodelay        on;
    gzip  on;
    gzip_disable "MSIE [1-6]\.(?!.*SV1)";
    gzip_proxied any;
    gzip_http_version 1.0;
    gzip_types text/plain text/xml text/css text/javascript
    gzip_buffers 8 32k;
    gzip_comp_level 2;
#put nginx cache files into tmpfs ram disk that is backed by swap
    proxy_cache_path /tmp/nginx_cache

	upstream backend {

	server {
		listen   80;
		server_name_in_redirect off;
		#normalize all accept-encoding headers to just gzip or empty string
		set $myae "";
		if ($http_accept_encoding ~* gzip) {set $myae "gzip";}
		#get rid of accept-encoding header for known-compressed file types
		#we only want to store one version of these files in cache
		if ($uri ~* \.(gif|jpg|jpeg|png|pdf|swf|flv|mp3|mp4|wmv)$) {set $myae "";}		
		access_log  /var/log/nginx/localhost.access.log;

		location / {
		proxy_pass http://backend;
		proxy_set_header Host $host;
		proxy_set_header Accept-Encoding $myae;
		proxy_read_timeout 900;
		proxy_redirect default;
		proxy_cache zone1;
		proxy_cache_valid 200 301 302 1m;
		proxy_cache_key "$host$request_uri$myae";



So this is only caching gif|jpg|jpeg|png|pdf|swf|flv|mp3|mp4|wmv?  That's almost exactly what I want.

Upstream backend is the ip address of what nginx is running on?  This box has 4 IPs for 4 different sites, should I list them all in upstream backend?

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