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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
Logging the performance of the Apache httpd web server

Apache's mod_status allows you to take a look at how your Apache httpd server is running - you can see a snapshot of some basic stats of the server, and also the current status of each of the threads. There are two options that you can apply to the URL as you look at the page - a refresh option to cause the page to update every so many seconds, and an auto option which allows you to reformat the output suitable for automatic processing.

The Apache source download includes a Perl script that will collect the data from the auto report and log it to a file ... but the script is (currently) out of date as some of the field names have changed under it, and it could do with a lick of paint, or perhaps a complete rebuild.

OK ... I rebuilt it ;-) - see [here] - it's a new logger that records far more information, including some wider server stats too and that does mean that you should run it from the web server, not remotely, if you want useful information

Be default, mod_status is disabled. And even when enabled, you'll want to limit it to where it can access from ... it's fairly standard httpd configuration stuff. If you're not familiar with configurinbg httpd, we cover it on our Linux Web Server course, and if you need some training on Linux too it's included in Deploying LAMP.
(written 2010-10-25, updated 2010-10-26)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
A692 - Web Application Deployment - Monitoring and load testing your server
  [1718] Increasing Java Virtual Machine memory for Tomcat - (2008-07-24)
  [2079] Java - Memory Allocation and garbage collection - (2009-03-14)
  [2080] Using ApacheBench and jconsole to test and monitor Tomcat - (2009-03-14)
  [2082] Jmeter - a first test case - (2009-03-14)
  [2272] Monitoring and loading tools for testing Apache Tomcat - (2009-07-07)
  [3019] Apache httpd Server Status - monitoring your server - (2010-10-28)
  [3027] Server logs - drawing a graph of gathered data - (2010-11-03)

A606 - Web Application Deployment - Apache httpd - log files and log tools
  [376] What brings people to my web site? - (2005-07-13)
  [1237] What proportion of our web traffic is robots? - (2007-06-19)
  [1503] Web page (http) error status 405 - (2008-01-12)
  [1598] Every link has two ends - fixing 404s at the recipient - (2008-04-02)
  [1656] Be careful of misreading server statistics - (2008-05-28)
  [1761] Logging Cookies with the Apache httpd web server - (2008-08-20)
  [1780] Server overloading - turns out to be feof in PHP - (2008-09-01)
  [1796] libwww-perl and Indy Library in your server logs? - (2008-09-13)
  [3087] Making the most of critical emails - reading behind the scene - (2010-12-16)
  [3443] Getting more log information from the Apache http web server - (2011-09-16)
  [3447] Needle in a haystack - finding the web server overload - (2011-09-18)
  [3491] Who is knocking at your web site door? Are you well set up to deal with allcomers? - (2011-10-21)
  [3554] Learning more about our web site - and learning how to learn about yours - (2011-12-17)
  [3670] Reading Google Analytics results, based on the relative populations of countries - (2012-03-24)
  [3974] TV show appearance - how does it effect your web site? - (2013-01-13)
  [3984] 20 minutes in to our 15 minutes of fame - (2013-01-20)
  [4307] Identifying and clearing denial of service attacks on your Apache server - (2014-09-27)
  [4404] Which (virtual) host was visited? Tuning Apache log files, and Python analysis - (2015-01-23)
  [4491] Web Server Admin - some of those things that happen, and solutions - (2015-05-10)


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Some other Articles
Tuning Apache httpd and Tomcat to work well together
Seventh day traveller on the six day railway
The legal considerations of your web presence - revisited
Logging the performance of the Apache httpd web server
Well House Manor - the next six years
Audio equipment
Exception handling in Perl - using eval
What are .pid files?
Children, zombies, and reaping processes
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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