Apachetop is a very helpful application/tool that allows to administrator/webmaster to monitor Apache traffic in real time. Apachetop provide the output that how many requests per second are generating, which files have been opened and how many times. It bassically veiw domain’s log files in same time and display the output. So monitor a website in real-time with apachetop.
Install l Apachetop on Centos 6
#rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/xxx_xx/epel-release-6-8.noarch.rpm
#yum install apachetop
#yum install apachetop
After that perform the below command from root user at bash shell
# apachetop -f /var/log/httpd/domain-access_log
If you have multiple domains and want to monitor multiple domains
#apachetop -f /var/log/httpd/domain1-access_log -f /var/log/httpd/domain2-access_log
Other useful options.
-f
-H
-T