Apachetop is a very useful and small program that displays the stats for Apache as they happen. It can tell you how many requests per second are coming in, what files have been accessed in the last set amount of time, and how many times. It can also show you who is hitting the sites and where they are coming from. It can be downloaded here or installed from the ports with

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

This program 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 log at /var/log/httpd-access.log, but if you set different log files for your virtual hosts (as you should have), you will need to tell it to watch these also with the -f flag. Since apachetop doesn’t seem to have a stored config file it is easiest to store the long command in a shell script.

#!/bin/sh

cd /usr/local/www/logs	
apachetop -f lamps-access_log -f tables-access_log

Every file must have the -f flag in front of it.

If your web server gets a low number of hits you will want to 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 instead of dropping them after a set period of time.

# apachetop -N 180 -f lamps-access_log

The above command will show stats for hits in the last 3 minutes.

# apachetop -T 100 -f lamps-access_log

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

Once in apachetop the program will begin displaying and calculating the stats as they come in, so at first it will be blank and not you very much. 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 with more commands press “h”.

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