3619 Using ApacheBench and jconsole to test and monitor Tomcat
Training, Open Source Computer Languages

Search for:
Print friendly page
Home Accessibility Courses Diary The Mouth Forum Resources Site Map About Us Contact
Using ApacheBench and jconsole to test and monitor Tomcat

jconsole lets you monitor Tomcat or another Java application so that you can see how much memory is in use, how many threads you have running, how many classes, etc.

Here's an example of a Tomcat server that was sitting virtually unused ... which we then exercised through ApacheBench - the ab utility that's supplied with Apache httpd, as follows:

ab -n 2000 -c 30 http://192.168.200.215:8080/whm_course/demo.jsp

That's calling for a page to be loaded 2,000 times - with a concurrency of 30 (in other words for there to be 30 connections all at the same time, simulating visits from 30 different places.

Not surprisingly, the effect of sending 30 concurrent requests was that Tomcat started another 30 threads to handle them (!) and those threads between them grabbed anothe4 4 Mbyes or so of memory. The cpu usage spiked to around 20%. What is interesting to note is that - once created - the threads live on in case further requests come in.

Tomcat Loading
(written 2009-03-14, updated 2009-03-15)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
A602 - Web Application Deployment - Apache httpd - Sourcing, Installation, Testing
  [3426] Automed web site testing scripted in Ruby using watir-webdriver - (2011-09-09)
  [2520] Global and Enable - two misused words! - (2009-11-30)
  [2184] Choosing the right version of Java and Tomcat - (2009-05-16)
  [2096] Where is my new Apache httpd installed - (2009-03-22)
  [1945] Summary - Apache httpd build on Linux - (2008-12-14)
  [1768] What is built in to this httpd and PHP? - (2008-08-23)
  [1731] Apache httpd, MySQL, PHP - installation procedure - (2008-08-01)
  [1707] Configuring Apache httpd - (2008-07-12)
  [1455] Connecting to MySQL 5 from PHP on Mac OSX Leopard - (2007-12-03)
  [1449] Upgrade Mac OSX to Leopard, Web Server Apache httpd config lost - (2007-11-29)
  [1292] DHCP automatic IP address v Static IP - (2007-08-06)
  [1095] Apache httpd , browser, MySQL and MySQL client downloads - (2007-02-28)
  [982] Notes from the white board - (2006-12-14)
  [907] Browser -> httpd -> Tomcat -> MySQL. Restarting. - (2006-10-28)
  [660] Stopping and restarting Apache httpd cleanly - (2006-03-29)
  [550] 2006 - Making business a pleasure - (2006-01-01)
  [526] Apache httpd - serving web documents from different directories - (2005-12-12)
  [523] Apache httpd release 2.2 - (2005-12-10)

A503 - Web Application Deployment - Java - Sourcing, Installing, Initial Testing
  [2153] Class Loading and Variable Conversion in Java - (2009-05-02)
  [2079] Java - Memory Allocation and garbage collection - (2009-03-14)
  [1908] Java CLASSPATH explained - (2008-11-26)

A692 - Web Application Deployment - Monitoring and load testing your server
  [3027] Server logs - drawing a graph of gathered data - (2010-11-03)
  [3019] Apache httpd Server Status - monitoring your server - (2010-10-28)
  [3015] Logging the performance of the Apache httpd web server - (2010-10-25)
  [2272] Monitoring and loading tools for testing Apache Tomcat - (2009-07-07)
  [2082] Jmeter - a first test case - (2009-03-14)
  [1718] Increasing Java Virtual Machine memory for Tomcat - (2008-07-24)


5518
Back to
Java - Memory Allocation and garbage collection
 Previous and next
or
Horse's mouth home		 Forward to
Connecting jconsole remotely - the principles
Some other Articles
Books and distance learning from Well House Consultants?
Do you support a decent train service? Please sign up!
Connecting jconsole remotely - the principles
Using ApacheBench and jconsole to test and monitor Tomcat
A lot has changed - but the memory lingers on
Why put Apache httpd in front of Apache Tomcat
A New Advert for Well House Manor
Supporting Parkinsons and Trains
4106 posts, page by page
Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83 at 50 posts per page


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.

Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).
You can Add a comment or ranking to this page
Public Training Courses
Running regularly at our UK training Centre.
[Schedule] - [About] - [Book]

Like this? ??

Related short articles
Perl Dancer - a Perl Framework - Installation and first test
Using object orientation for non-physical objects
Test Driven Development in Python - Customer Comes First
Cacheing class for Python - using a local SQLite database as a key/value store
stdClass in PHP - using an object rather than an associative array
An overpractical test of our backup strategy!
Using web services to access you data - JSON and RESTful services
Using Pygments to colour our training examples
Tips on Tomcat - moving applications around
Using a vector within an object - C++
Testing code coverage (have I tested everything?) in PHP
Testing classes for your PHP website with PHPUnit
The components of an Apache httpd / Tomcat / MySQL stack and what each does
Using CGI and Perl to put a simple application online. Sometimes still the best way.
Using Perl to read an RSS feed off a web site and extract data - via LWP and XML modules
Associated Classes - using objects of one class within another
Reading files, and using factories to create vectors of objects from the data in C++
Ruby on the web - a simple example using CGI
Using Lua tables as objects
Setting up your Linux system as a firewall using iptables
Finding all the unique lines in a file, using Python or Perl
Using Make for a distribution
Keeping our hotel looking like new, by using our gained experience
Demonstration of a form using Django
Some TestWise examples - helping use Ruby code to check your web site operation
Designing your application - using UML techniques
Using Perl to generate multiple reports from a HUGE file, efficiently
Practical Extraction and Reporting - using Python and Extreme Programming
Testing your Python classes with the unittest package - how to
Static variables in functions - and better ways using objects
Reading and using emails including enclosures on your web server.
Checking all the systems on a subnet, using Expect and Tk
Perl and CGI - simple form, and monitoring script.
Perl - a quick reminder and revision. Test yourself!
Perl - making best use of the flexibility, but also using good coding standards
Specification, Design, Implementation, Testing and Documentation - stages of a (Java) programming project
Using public transport - USA style
Distributing the server load - yet ensuring that each user return to the same system (Apache httpd and Tomcat)
Using functions to keep look and feel apart from calculations - simple C example
Rake - a build system using code written in Ruby
Using C and C++ functions in the same program - how to do it
Testing the new pavement ready for Christmas
Tuning Apache httpd and Tomcat to work well together
Exception handling in Perl - using eval
Using an exception to initialise a static variable in a Python function / method
Testimonials - Well House Consultants Open Source courses
Testing the robustness of our hotel and training systems - holiday and sickness times
Robust - testing the system
Switching from Adobe Photoshop to Gimp - testing it on animals
Using java, javac, jar, and CLASSPATH - a simple example
Ruby - training for automated testing users
Monitoring the success and traffic of your web site
Redirecting a home page using mod_rewrite
How to build a test harness into your PHP
Web page to telephone calls / links using an iPhone
What does a web application look like under Tomcat?
Shipping a test harness with your class in PHP
An example of an injection attack using Javascript
Tips for writing a test program (Ruby / Python / Java)
Re-using our pictures
Creating, setting up and using objects in C++
Using JSPs, Tag Libraries, Java Beans, Tomcat in one short example
Parallel Pinging, using Python Threads or Expect spawn lists
Clustering on Tomcat
Load balancing with sticky sessions (httpd / Tomcat)
Using Tcl and Expect to automate repetitive jobs
Using print_r in PHP to explore mysql database requests
Testing code in Python - doctest, unittest and others
Using a cache for efficiency. Python and PHP examples
Apache, Tomcat, mod_proxy
Graphics in Lua - an example using the gd library
Python - using exceptions to set a fallback
Three recent questions on Tomcat Convertors
What difference does using the XHTML standard really make?
Transforming data in Perl using lists of lists and hashes of hashes
Configuring httpd, or Tomcat, to run CGI scripts in Perl
Multiple web applications under Tomcat - what are the options?
Monitoring and Tuning your MySQL installation
An FAQ on the Apache httpd and Apache Tomcat web servers, and on using them together
Using the internet to remotely check for power failure at home (PHP)
4a8
© WELL HOUSE CONSULTANTS LTD., 2013: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • FAX: 01144 1225 899360 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho

PAGE: http://www.wellho.net/mouth/2080_Usi ... omcat.html • PAGE BUILT: Mon May 27 06:13:46 2013 • BUILD SYSTEM: wizard
0