CentOS 6, httpd-2.2 and php-fpm

When your webserver is receiving a lot of traffic and began slow your website down, you might be consider to switch mod_php with php-fpm.

• First get mod_fastcgi from rpmforge

# yum install http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm
# yum install mod_fastcgi

• Install php-fpm

# yum install php-fpm

• Configure php-fpm

# vi /etc/php-fpm.d/www.conf
listen = /var/run/php5-fpm.sock
;listen = 127.0.0.1:9000
listen.backlog = 1024
listen.owner = apache
listen.group = apache
listen.mode = 0666

user = apache
group = apache

pm = ondemand
pm.max_children = 75
pm.start_servers = 10
pm.min_spare_servers = 5
pm.max_spare_servers = 20
pm.process_idle_timeout = 10s
pm.max_requests = 500

• Rename mod.php to mod.php.bak

# cd /etc/httpd/conf.d/
# mv php.conf php.conf.bak

that will disabled mod_php.

• Configure mod_fastcgi in /etc/httpd/conf.d/fastcgi.conf. add these lines at the end of file.

# vi /etc/httpd/conf.d/fastcgi.conf
...
FastCgiWrapper Off
FastCgiConfig -idle-timeout 20 -maxClassProcesses 1
...
DirectoryIndex index.php
AddHandler php-fcgi .php
Action php-fcgi /php-fcgi
Alias /php-fcgi /cgi-bin-php.fcgi
FastCgiExternalServer /cgi-bin-php.fcgi -socket /var/run/php5-fpm.sock -pass-header Authorization

• Start php-fpm and restart httpd service.

# service php-fpm start
# service httpd restart

that’s it.