IHS or Apache 2 Performance Tuning

Ok, How to improve Apache performance, i´ll show you some tips:

1- Use mod_gzip to compress html, text, css... here is a example:

DeflateCompressionLevel 9

AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE image/svg+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/atom_xml
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/x-httpd-php
AddOutputFilterByType DEFLATE application/x-httpd-fastphp
AddOutputFilterByType DEFLATE application/x-httpd-eruby
AddOutputFilterByType DEFLATE text/html


2 - Enable Apache cache, example:

LoadModule disk_cache_module modules/mod_disk_cache.so

CacheRoot /www/cache

## 1 Gb ##
CacheSize 100000000

##6 Mb ##
CacheMaxFileSize 6400000

## 640 bytes ###
CacheMinFileSize 640

## Expires in 1 hour ###
CacheDefaultExpire 3600
## Things to do cache ##
CacheEnable disk /

CacheDirLevels 5
CacheDirLength 3



3 - Combination of mod_headers and mod_expires, example:

LoadModule headers_module modules/mod_headers.so

Header set Cache-Control "public"

### Enable mod Expire ###

LoadModule expires_module modules/mod_expires.so

# turn on the module for this directory
ExpiresActive on
Header set Cache-Control "public"

# cache common graphics for 3 days
ExpiresByType image/jpg "access plus 3 days"
ExpiresByType image/gif "access plus 3 days"
ExpiresByType image/jpeg "access plus 3 days"
#ExpiresByType application/pdf "access plus 3 days"
ExpiresByType application/x-javascript "access plus 3 days"
ExpiresByType application/x-shockwave-flash "access plus 3 days"
ExpiresByType video/x-flv "access plus 3 days"
ExpiresByType text/plain "access plus 3 days"
ExpiresByType text/javascript "access plus 3 days"
ExpiresByType application/javascript "access plus 3 days"

# cache CSS for 3 days
ExpiresByType text/css "access plus 3 days"

# set the default to 24 hours
ExpiresDefault "access plus 3 seconds"



All this things will reduce in 30%-40% you network traffic and improve the speed.
In my opinion the best module is mod_gzip, cause no impact on the applications, all almost all web browsers support it.
Good Luck