In Apache2.2 following line is uncommented in apache/conf/httpd.conf by default. LoadModule socache_shmcb_module modules/mod_socache_shmcb.so From Apache 2.4 above line is commented so remove the # sign before it. This should work.
A pros/cons comparison for those modules exists on http://blog.jboss.org/ mod_proxy * Pros: o No need for a separate module compilation and maintenance. mod_proxy, mod_proxy_http, mod_proxy_ajp and mod_proxy_balancer comes as part of standard Apache 2.2+ distribution o Ability to use http https or AJP protocols, even within the same balancer. * Cons: o mod_proxy_ajp does not … Read more