I would also read about "how to scale up web applications" ! Also you may talk to those which have their web apps already in the cloud ! In a cloud, adding more CPU's, adding more memory, adding more data storage space is easy. And what about communication and data band width and related equipment ? any clues about how large or small your request/reply packages are ? It is a difference if 5000 users download a streaming movie in real-time, or streaming music in real-time, or streaming compressed stock market data in even better real time or books or any other sort of compound documents in 8 to 10 minutes down load time,; so what are the demands from a user perspective to reach a high quality of service? Josef Stadelmann
-----Ursprüngliche Nachricht----- Von: Mark Eggers [mailto:its_toas...@yahoo.com] Gesendet: Mittwoch, 31. Juli 2013 00:18 An: Tomcat Users List Betreff: Re: Configuration question for 2500 simultaneous users. On 7/30/2013 1:17 PM, Tomcat Random wrote: > Thanks Mark, I will give it a close read. > > As far as profiling, are you using any tools that are worth mentioning? > Nothing outstanding, since currently all of our applications are pretty lightweight. That may change if we redo the architecture. JMeter / Selenium in combination can generate a lot of traffic. Generate a selenium test script, export to JUnit, couple with HTMLUnit, and hammer away. There are several ways to watch what goes on with your application: JConsole VisualVM The Tomcat Wiki page has more: http://wiki.apache.org/tomcat/FAQ/Monitoring For lighter weight profiling (usually to figure out where the application bottlenecks are), I run the project under NetBeans and instrument the project. Access logs are usually a good first source for generating JMeter tests. In general, people can only give you guidelines concerning sizing, profiling, and benchmarking. The particulars depend on your particular application. . . . . just my two cents. /mde/ PS - Please don't top post. > Best, > A > > > > On Tue, Jul 30, 2013 at 4:02 PM, Mark Eggers <its_toas...@yahoo.com> wrote: > >> On 7/30/2013 12:42 PM, Tomcat Random wrote: >> >>> The project I'm working on has 5000 simultaneous users average. I >>> have two physical servers both running an instance of Tomcat 7.0. >>> They're behind a physical load balancer with sticky, least >>> connections balancing. Nothing in front of the Tomcats. Port 80 to >>> is routed to them by iptables. >>> >>> Anyone out there willing to offer some tips (or point me to them) on >>> configuration for this amount of traffic? >>> >>> Environment is: >>> DELL PowerEdge R720 - 32 GB DELL RAM, GB Memory: 32 Single Socket >>> Six Core Intel Xeon E5-2640 2.5GHz, #Processors: 1, #Cores per Proc: >>> 6 RHEL 6 >>> >>> TIA, >>> Alec >>> >>> >> A great overview, and a solid outline of the process you should follow: >> >> http://people.apache.org/~**markt/presentations/2009-04-** >> 01-TomcatTuning.pdf<http://people.apache.org/~markt/presentations/200 >> 9-04-01-TomcatTuning.pdf> >> >> That, plus profiling your application with real-world traffic to >> understand bottlenecks and use cases . . . >> >> . . . just my two cents. >> /mde/ --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
