Hi everyone, [running IBM JDK 1.3 for linux, debian, tomcat 3.2.2, mod_jk] I have a small, or rather large problem. We have a couple of servlets that generates gif-images. Since that takes about 0.6 sec we cache these on apache. This is a nifty hack where all access goes to http://host/static/blaha.gif This sends precached gifs. If a gif is missing, the 404 Error handler is a perl-script that connects to http://host/webapp/blaha.gif using w3c (from lib-www?) and writes down the result both to the static cache and send it to the browser. (webapp is mapped using mod_jk) Works good! But we have noticed that something is extremely slow. If we connect to http://host:8081/webapp/blaha.gif it takes about 0.5 seconds. If we connect to http://host/webapp/blaha.gif (which is mounted to loadbalancer consisting of two workers(pooled ajp13).. this works great in all other tests) it takes about 17!! seconds!. When I try to access other static documents using the loadbalancer it works great, however this servletmapping seems realy slow. For now I have solved it by sending all requests from the error 404 script directly to a tomcat worker (using http) without using loadbalancer. However, then I'll lose the redundancy I want. Anyone who has ideas is more than welcome to mail me! /david ps. I have seen a lot of people requesting help on setting up simple loadbalancers. Mail me in private if you want to know more about my setup. I use two tomcat workers running on a single host. This gives me no speed gain but som redundancy as well as easier maintance. One worker can be taken down while the other continues to serve the site.
