1. Installing apachetop

To install apachetop in CentOS, Fedora:

# yum install apachetop

Make sure you have DAG repository enabled.

To install apachetop in Debian, Ubuntu:

# sudo apt-get install apachetop

To install apachetop in FreeBSD:

# cd /usr/ports/sysutils/apachetop/
# make install clean

2. Using apachetop

apachetop essentially just watches the log files and constantly computes the stats. It can be set to show stats for the last set amount of time, or for the last set number of hosts.
It defaults to monitoring the defaults apache log file, but if you have virtual hosts, you will need to tell it to watch these also with the -f flag.

# apachetop -f /var/log/httpd/site1-access_log -f /var/log/httpd/site2-access_log

If your web server gets a low number of hits you can use the -N flag so that it shows you more information instead of clearing hits after 30 seconds. The -N flag sets the number of hits apachetop remembers. You can also use -T to change the length of time it remembers the hits.

This command will show stats for hits in the last 5 minutes.

# apachetop -N 300 -f /var/log/httpd/access_log

This command will have apachetop remember the last 100 hits and show the statistics for them.

# apachetop -T 100 -f /var/log/httpd/access_log

Once in apachetop the program will begin displaying and calculating the stats as they come in, so at first it will be blank. To switch between showing what files are getting hit, what hosts are accessing the web server, and where they are coming from press "d".

For the help menu press "h".

The asterisks match all addresses, so the main server serves no requests. Due to the fact that www.example.com is first in the configuration file, it has the highest priority and can be seen as the default or primary server. That means that if a request is received that does not match one of the specified ServerName directives, it will be served by this first VirtualHost.

The above configuration is what you will want to use in almost all name-based virtual hosting situations. The only thing that this configuration will not work for, in fact, is when you are serving different content based on differing IP addresses or ports.

Using the ServerPath directive

We have a server with two name-based vhosts. In order to match the correct virtual host a client must send the correct Host: header. Old HTTP/1.0 clients do not send such a header and Apache has no clue what vhost the client tried to reach (and serves the request from the primary vhost). To provide as much backward compatibility as possible we create a primary vhost which returns a single page containing links with an URL prefix to the name-based virtual hosts.

Due to the ServerPath directive a request to the URL http://www.sub1.domain.tld/sub1/ is always served from the sub1-vhost.
A request to the URL http://www.sub1.domain.tld/ is only served from the sub1-vhost if the client sent a correct Host: header. If no Host: header is sent the client gets the information page from the primary host.

Please note that there is one oddity: A request to http://www.sub2.domain.tld/sub1/ is also served from the sub1-vhost if the client sent no Host: header.

The RewriteRule directives are used to make sure that a client which sent a correct Host: header can use both URL variants, i.e., with or without URL prefix.

Copyright 2006 The Apache Software Foundation.
Licensed under the Apache License, Version 2.0

First of all, you should be convinced, that your server uses the mod_status module. For this purpose open in your text editor a web server configuration file httpd.conf. Find the section loading modules and check up, whether there is there a line:

LoadModule status_module modules/mod_status.so

This line can differ a little depending on the version of your server and operation system. If this line has ahead a symbol # that remove it.
 

Now you should locate lines:

# Real-time info on requests and configuration
#Include conf/extra/httpd-info.conf

and uncomment second line:

# Real-time info on requests and configuration
Include conf/extra/httpd-info.conf

Now need to proceed to a configuration of the status. Open conf/extra/httpd-info.conf file and find the lines:

#ExtendedStatus On

Remove # symbol:

ExtendedStatus On

Check your domain name:

<Location /server-status>
   SetHandler server-status
   Order deny,allow
   Deny from all
   Allow from .yourdomain.com
</Location>

Or for testing:

<Location /server-status>
   SetHandler server-status
   Order deny,allow
   Deny from all
   Allow from all
</Location>

Line "Allow from .yourdomain.com" enables queries of the status from any computer of your domain(yourdomain.com). If you want to limit access only for the your computer, you should write "Allow from yourcomputer.yourdomain.com". Where your computer is a name of your computer and yourdomain - a name of your domain. Also you can write "Allow from all". In this case, the statistics of your wed server will be accessible from any computer in the Internet. We urgently do not recommend so to do, you should have very serious reason for this purpose!

Your web server configuration is finished! Now you should save your changes and restart your web the server.

Handy Software Lab today announced it will launch a new version of its application, HSLAB HTTP Monitor, which works with Microsoft Windows7/Microsoft Windows Server2008 R2 to offer customers enhanced security, as well as innovative user interface features and reliability improvements.With HSLAB HTTP Monitor, administrators always know who is currently connected, server operations distribution, amount of bandwidth being consumed, and number of server requests per unit of time. Since software is server independent, server running on Apache may be located thousands of miles away from where program is installed. Software shows all virtual servers being hosted, statistics for them, and what files or documents are being accessed.

?Our ISV community is alive with innovation, and we?re committed to helping our partners drive the next generation of software experiences,? said Ross Brown, Vice President of ISV and Solutions Partners for the Worldwide Partner Group at Microsoft. ?Adding compatibility for the latest Microsoft operating systems helps ISVs to stay ahead of the competition and give their customers access to cutting-edge technologies.?

Handy Software Lab is excited to launch this new version of HSLAB HTTP Monitor, said CEO at Handy Software Lab. ?Making our application compatible with Microsoft Windows 7/Microsoft Windows Server 2008 R2 helps us offer our customers compelling benefits, including intuitive user interfaces, improved security and reliability features, full support for multi-core processing, sophisticated management features, flexible access administration.

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LoadModule status_module modules/mod_status.so

This line can differ a little depending on the version of your server
and operation system. If this line has ahead a symbol # that remove
it.

Read more at
http://www.hs-lab.com/usage/faq/content/2/1/en/how-to-configure-apach...