httpd -l

yum install mod_logio

# httpd -v
Server version: Apache/2.2.24 (Unix)
Server built:   Mar 21 2013 17:04:05
# uname -a
Linux liit 2.6.18-348.12.1.el5 #1 SMP Wed Jul 10 05:28:41 EDT 2013 x86_64 x86_64 x86_64 GNU/Linux
# cat /proc/version
Linux version 2.6.18-348.12.1.el5 (mockbuild@builder10.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-54)) #1 SMP Wed Jul 10 05:28:41 EDT 2013
# cat /etc/redhat-release
CentOS release 5.9 (Final)