[Building Sakai] Load test of Sakai

[Peter Crowther]

2009/8/20 Daniel Lind <Daniel.Lind at umdac.umu.se>

> Hi!
>
> We're investigating the limitations of Sakai when it comes to capacity of
> users. We have created some test plans in JMeter where users are taking
> tests consisting of 25 questions (multiple choice, true/false and Short
> answer) in Test&Quizzes. When we run this test we have come to these
> conclusions:
>
> One Tomcat: Maximum of 430 simultaneous users from two JMeter instances.
> Two Tomcat (on the same server): Maximum of 630 users from two JMeter
> instances.
>
>
> When I say max it means the response times are way too long to be
> acceptable (connect >2s and response >10s).
>

Daniel, how much user "think time" are you allowing between responses?  With
T&Q, in particular, you'd expect users to spend some time reading the
question and working out the answer.

Also, as a matter of interest, what limit are you hitting first - CPU, RAM
(and hence CPU due to GC or disk due to paging or reduced cache hits), disk
i/o or network capacity?

- Peter
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