Re: [JBoss-user] JBoss Performance Tuning Tips - a bit of an emergency

[Stephen D. <go...@fr...>]

Elankath, Tarun (Cognizant) wrote:
> Hi all,
> 
> We have a small web + ejb application for a POC (Proof of Concept) that is competing against a corresponding .NET application. We are using Struts, 1 Stateful Session Bean, 1 Stateless Session Bean and only 10 JSP pages. The application connects to a separate MS-SQL database server.
> 
> This application is being deployed in WebSphere, JBoss across Windows and Linux as the target servers.
> 
> So far, JBoss is giving the worst results on a 1000 user stress test, which I am certain is ENTIRELY due to my inexperience with this application server, and nothing whatsover to do with jboss.
> 
> All performance tips on tuning jboss config parameters will be much appreciated. I have done the following:
> -increased ms and mx heap size
> -increased connection pool size
> -increase maxProcessor,minProcessor setting (for Tomcat)
> -decreased session timeouts.
> -made log level to ERROR in log4.xml
> 
> I am still now sure on how to disable class reloading totally.
> 
> 
> All tips/suggestions will be deeply appreciated. If JBoss performs good, then our client would definitely prefer .Net to Java, just for the cost factor.
> 
> Regards,
> Tarun
> 
> 
Hi Tarun.

At this point, I would recommend starting a profiler (I like Optimizeit, but there are others as well, pick your favorite), and seeing where the hangup is.  Because it sounds like you do have one.

Some of the nastiest I ever found (was not in JBoss itself, but sometimes in code running on it) had to do with synchronized methods (especially a static synchronixed in an abstract base class).  A profiler would show if a 
method was getting stuck somewhere.

Just a suggestion.

Good luck,
Steve
-- 
Java/J2EE Developer/Integrator
Co-Chair, Dallas/FortWorth J2EE Sig
214-724-7741