# rpm -qa |grep -i libwww perl-libwww-perl-5.805-1.1.1 

# yum install perl-libwww-perl.noarch Loaded plugins: security Setting up Install Process Package perl-libwww-perl-5.805-1.1.1.noarch already installed and latest version Nothing to do 

munin-run apache_processes busy80.value U idle80.value U free80.value U 

munin-run apache_processes auto # Warning: Unrecognised argument 'auto' passed to plugin. busy80.value U idle80.value U free80.value U 

I uncomment this variable : 
grep -i extendedstatus /etc/httpd/conf/* /etc/httpd/conf/httpd.conf:# ExtendedStatus controls whether Apache will generate "full" status

/etc/httpd/conf/httpd.conf:# information (ExtendedStatus On) or just basic information (ExtendedStatus 

/etc/httpd/conf/httpd.conf:ExtendedStatus On 

And restart apache.