This is also a nice resource from Sun: http://java.sun.com/performance/reference/whitepapers/6_performance.html
JAVIER SANCHEZ EDESA S.A. On Fri, Jun 13, 2008 at 9:06 AM, 9902468 <[EMAIL PROTECTED]> wrote: > > Hi, > > @Persist annotation is bad for scalability and should be avoided where > possible. Of course, this cannot be always done. > > If it is known that only couple of users uses the page (Admin console or > something.) then you can persist larger objects to session. And you don't > need to have that user object with addresses etc. hanging in the session > for > the most of the time... > > Use common sense where to optimize. Optimize only in areas where the reward > is significant: Don't use your valuable time where it doesn't matter. > Eventually server runs out of memory, no matter what you do if you are > given > infinite amount of users. > > If memory always runs out in production, (And the user count should be > acceptable.) then there is programming error that prevents jvm from > reclaiming the memory. See > http://www.ibm.com/developerworks/library/j-leaks/index.html for more > information. > > With T5 we haven't had single issue with this, but this can be due to many > things as Kristian pointed out. > > -99 > > > Marcelo Lotif-2 wrote: > > > > Hi guys, > > I had some problems like this too, and i want to know from you, > > tapestry experts: > > Do you think that the wrong usage of @Persist annotation can cause > > problems like this? If we have more things to "persist", we will have > > a bigger client session, combined with many clients all the time in a > > tiny "server" like that: BUM! what do you think? > > > > Thanks in advance! > > > > 2008/6/13 9902468 <[EMAIL PROTECTED]>: > >> > >> Hi, > >> > >> We had same symptoms with 5.5.25 using T4 during _development_. Our case > >> was > >> identified that the live class loading resulted in that error once the > >> app > >> got big enough. The live reloading is somewhat broken anyway in Tomcat, > >> so > >> we moved to Glassfish in our next project as the development server. The > >> experience has been better with Glassfish, it takes longer to initially > >> start, but feels faster once up & live reloading works better -> not so > >> much > >> need to restart all the time. > >> > >> Haven't had single issue in production (In production we use JBoss.). > >> > >> - 99 > >> > >> > >> Estevam Henrique Portela Mota e Silva wrote: > >>> > >>> Good Afternoon, > >>> > >>> Who knows the problem of tomcat on the server. > >>> > >>> Tomcat's war have 17 in my company > >>> Memory (Initial memory pool: 512mb and Maximum memory pool: 1024mb) > >>> Version: > >>> --> Tomcat 5.5.26 > >>> --> JDK 6_05 > >>> Server: > >>> --> Gigabyte, Core 2 Duo and Memory 2 gb (motherboard has maximum > >>> of > >>> memory is 2 gb) > >>> Added: > >>> --> Isapi Redirector 1.2.14 on another server (IIS 5.0 and Win > >>> 2000) > >>> Note: > >>> --> All programs are installed executable (EXE) > >>> > >>> When I clicked generate PDF (Jasper) in my project, was wrong ... See > >>> below > >>> pra > >>> > >>> [ERROR] RequestExceptionHandler Processing of request failed with > >>> uncaught > >>> exception: PermGen space > >>> java.lang.OutOfMemoryError: PermGen Space > >>> > >>> How resolved? > >>> > >>> -- > >>> Regards, > >>> > >>> Estevam Henrique Portela Mota e Silva > >>> Handicapped Auditory = deaf > >>> [EMAIL PROTECTED] / [EMAIL PROTECTED] > >>> Programmer Java and Tapestry > >>> Brazil - Fortaleza / CE > >>> > >>> > >> > >> -- > >> View this message in context: > >> > http://www.nabble.com/Tomcat-5.5.26-%2B-JDK-6_05---java.lang.OutOfMemoryError%3A-PermGen-Space-tp17804956p17816332.html > >> Sent from the Tapestry - User mailing list archive at Nabble.com. > >> > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: [EMAIL PROTECTED] > >> For additional commands, e-mail: [EMAIL PROTECTED] > >> > >> > > > > > > > > -- > > Atenciosamente, > > Marcelo Lotif > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > -- > View this message in context: > http://www.nabble.com/Tomcat-5.5.26-%2B-JDK-6_05---java.lang.OutOfMemoryError%3A-PermGen-Space-tp17804956p17824237.html > Sent from the Tapestry - User mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
