On 2012-03-26, at 12:09 PM, Kevin Hinkson wrote:

> Hi all,
> I have been playing with Apache Bench to determine at what number of 
> concurrent sessions/request load my app starts to fail and to find and reduce 
> any bottlenecks.

Be aware that this is not easy and that setting up the tests and getting them 
to run in a realistic simulation of actual load is not trivial.


> The first thing I run into is the "No instance available error".

That may just mean it overwhelmed your app.


> Does anyone have pointers for stress testing a webobjects app and determining 
> what the bottlenecks are? Do the http adaptor settings play a big role in 
> scaling up an app?

No, your code and database tuning play a much larger role.


Chuck

-- 
Chuck Hill             Senior Consultant / VP Development

Practical WebObjects - for developers who want to increase their overall 
knowledge of WebObjects or who are trying to solve specific problems.    
http://www.global-village.net/gvc/practical_webobjects








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