Monitoring mod_jk and how it is load balancing

Apache httpd with mod_jk has the ability to balance the load forwarded to a number of instances of a Java application running in different Tomcat containers, probably on different host c.p.u.s in most circumstances. I covered this a few days ago - see here for details.

But there's a follow up question "how is the loading working out", and the status monitor in mod_jk provides you with a web front end to the stats. There's a sample configuration file here; the captured display looks something like:

JK Status Manager

(written 2007-10-07)

Associated topics are indexed under

A655 - Web Application Deployment - Using Tomcat and Apache httpd Together
  [3018] Tuning Apache httpd and Tomcat to work well together - (2010-10-27)
  [2482] Load balancing with sticky sessions (httpd / Tomcat) - (2009-10-29)
  [1944] Forwarding session and cookie requests from httpd to Tomcat - (2008-12-14)
  [1940] URL rewriting with front and back servers - (2008-12-14)
  [1938] Predictive Load Balancing - PHP and / or Java - (2008-12-13)
  [1771] More HowTo diagrams - MySQL, Tomcat and Java - (2008-08-24)
  [1552] Extra public classes in deploying Apache httpd and Tomcat - (2008-02-24)
  [1549] http, https and ajp - comparison and choice - (2008-02-22)
  [1376] Choosing between mod_proxy and mod_rewrite - (2007-10-02)
  [631] Apache httpd to Tomcat - jk v proxy - (2006-03-03)
  [576] Why run two different web servers - (2006-01-25)
  [436] Linking Apache httpd to Apache Tomcat - (2005-09-05)

A900 - Web Application Deployment - Tomcat - Extra Features
  [1939] mod_proxy_ajp and mod_proxy_balancer examples - (2008-12-13)
  [1899] Virtual Hosting under Tomcat - an example - (2008-11-22)
  [1896] Virtual Hosts and Virtual Servers - (2008-11-20)
  [1377] Load Balancing with Apache mod_jk (httpd/Tomcat) - (2007-10-02)
  [1370] Apache Tomcat Performance Tuning - (2007-09-29)
  [1121] Sharing the load with Apache httpd and perhaps Tomcat - (2007-03-29)
  [1006] Apache httpd and Apache Tomcat together tips - (2006-12-24)
  [934] Clustering, load balancing, mod_rewrite and mod_proxy - (2006-11-21)

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