Ravi, We have load tested our Trinidad application with up to 800,000 page loads/hr. and the application handled it fine. We have also simulated up to 190 concurrent users. We are using MyFaces 1.1.5 and Trinidad 1.0.5. We are using the Oracle Application Server 10GR3 and are running on Linux.
-Richard On Fri, Jan 8, 2010 at 3:12 PM, Ravi Kapoor <[email protected]> wrote: > I have 2 GB on the machine and it only uses 1 GB. > > Can you give details on your environment. Especially trinidad version, CPU > details and how many users per JVM can you handle, what %age of CPU is > consumed by trinidad etc > > Regards > Ravi > > On Fri, Jan 8, 2010 at 4:08 PM, Richard Yee <[email protected]> > wrote: > > > How much physical memory is on your testing machine? > > I have a few Trinidad applications in production and don't see any of the > > performance issues you are having. > > > > -Richard > > > > > > > > On Fri, Jan 8, 2010 at 12:33 PM, Jan-Kees van Andel < > > [email protected]> wrote: > > > > > I'm not sure, but I doubt the mailing list supports attachments. > > > Maybe you could provide a link to some image hosting site? > > > > > > My first thought, reflection is darn cheap, especially since Java 5 > > > and even more since Java 6. I'm no IBM JVM specialist, but I don't > > > think there are major differences with HotSpot... Compared with SQL > > > queries, backend transactions, web service calls, etc. reflective > > > method invocations really don't make a difference. > > > > > > Having said that, what kind of application are you testing? Does this > > > application have any I/O, locking or other expensive things that may > > > be the cause of the CPU-time imbalance? > > > > > > Also, what kind of load are you simulating on your application? Long > > > sessions with not much users? Lots of short sessions? Hyperactive > > > users without any pauses? > > > > > > /JK > > > > > > Ps. How did you configure your profiler? Sampling or > > > tracing/instrumentation? Although I don't think it makes a difference > > > in this case, sampling is less accurate... > > > > > > > > > 2010/1/8 Ravi Kapoor <[email protected]>: > > > > > > > > The actual call to getter method is only using 2% CPU. Rest 38% is > > being > > > > used within trinidad classes. > > > > I am attaching two screenshots to give you more details. > > > > > > > > In first screenshot, you can see at the top left corner, total CPU > > units > > > > taken by getProperty are 32391 > > > > getProperty calls javax.faces.el.ValueBinding.getValue which calls > > > > org.apache.myfaces.el.PropertyResolverImpl.getValue which calls > > > > org.apache.myfaces.el.PropertyResolverImpl.getProperty which calls > > > > java.lang.reflect.Method.invoke. > > > > > > > > In second screenshot you can see that Method.invoke is using only > 1781 > > > units > > > > of CPU. Rest of the time is being spent within trinidad classes. > > > > > > > > Does this help? Also the rest of trinidad using 45% CPU usage is also > > > highly > > > > concerning. > > > > > > > > Thanks > > > > Ravi > > > > > > > > > > > > On Fri, Jan 8, 2010 at 1:47 PM, Jan-Kees van Andel > > > > <[email protected]> wrote: > > > >> > > > >> Hey, > > > >> > > > >> Is it possible that the getProperty indirectly invokes some > expensive > > > >> computation? For example, do you have lots of logic inside your > > > >> getters? > > > >> > > > >> Regards, > > > >> Jan-Kees > > > >> > > > >> > > > >> 2010/1/8 Ravi Kapoor <[email protected]>: > > > >> > Hi Matthias, > > > >> > > > > >> > Here are the details: > > > >> > > > > >> > Server: Websphere 6.1 > > > >> > > > > >> > Trinidad version: 1.0.7 (We cant upgrade to 2.0 until we upgrade > > > >> > websphere > > > >> > which will happen in due course. Even then if this issue has not > > been > > > >> > addressed, the problem may exist in 2.0 as well.) > > > >> > > > > >> > OS: Windows (Even though I am measuring numbers on windows but I > do > > > not > > > >> > think this is OS specific) > > > >> > > > > >> > > > > >> > Let me know if you need to know anything else. > > > >> > > > > >> > Regards > > > >> > Ravi > > > >> > > > > >> > > > > >> > > > > >> > On Fri, Jan 8, 2010 at 1:09 AM, Matthias Wessendorf > > > >> > <[email protected]>wrote: > > > >> > > > > >> >> Hello Ravi, > > > >> >> > > > >> >> some more background would be good, e.g. what version of Trinidad > > > etc. > > > >> >> > > > >> >> -Matthias > > > >> >> > > > >> >> On Thu, Jan 7, 2010 at 11:25 PM, Ravi Kapoor < > > > [email protected]> > > > >> >> wrote: > > > >> >> > Has anybody done performance tests on trinidad application. I > > have > > > an > > > >> >> > application and it appears that it is taking 80-90% of CPU in > my > > > >> >> > application, thus killing performance. > > > >> >> > > > > >> >> > We ran load tests and our CPU went to 100% usage. At this point > > we > > > >> >> measured > > > >> >> > how much time was being taken by each class/method. Here are > some > > > >> >> > interesting figures: > > > >> >> > > > > >> >> > CPU usage by all Trinidad + myfaces classes = 80-90% > > > >> >> > Myfaces CPU usage (without trinidad) = 8% (which implies > trinidad > > > is > > > >> >> taking > > > >> >> > 70-80% of CPU) > > > >> >> > Total time taken by one method > > > >> >> > (org.apache.myfaces.trinidad.bean.FacesBeanImpl.getProperty) = > > 40% > > > >> >> > > > > >> >> > Can anybody confirm that they have seen this behavior? > > > >> >> > Or if somebody can confirm that this does not happen in their > > > >> >> > performance > > > >> >> > tests, that should help too. > > > >> >> > > > > >> >> > Thanks > > > >> >> > Ravi > > > >> >> > > > > >> >> > > > >> >> > > > >> >> > > > >> >> -- > > > >> >> Matthias Wessendorf > > > >> >> > > > >> >> blog: http://matthiaswessendorf.wordpress.com/ > > > >> >> sessions: http://www.slideshare.net/mwessendorf > > > >> >> twitter: http://twitter.com/mwessendorf > > > >> >> > > > >> > > > > > > > > > > > > > > >
