The enhanced test
After a lot of research work in the past 2 days, we would like to try out the new cognitions from our researches in different areas (application server settings, Apache setting and the loadbalancer settings (mod_jk)). As our first test was in the middle of the week, where our users are most active, we try out the new settings today (Saturday), when less users visit the platform.
The situation is as follows:
Webserver layer: Apache with new mod_jk settings as webserver and load balancer on the Sun E420R
Application Server layer:
2 instances of Tomcat 5.5.16 on the Sun T2000
2 instances of Tomcat 5.5.16 on the AMD Opteron
Database layer: MySQL 5.0.19 on the Intel Xeon
And here are the results:
With about 2000 concurrent users online at peak times, the load average of the Sun T2000 is at 2,5 with a CPU usage of about 10%. At the same time, the AMD Opteron machine has a load average of about 2 with a CPU usage of 99,9%. The performance on both sides is good and page delivery time is about 1 second.
Wow!!! This is the performance, we were seraching for!
But how will it behave on monday, when most of our users connect to our platform.
Will the performance be the same? We will see.