There seems to be something terribly weird going on. Your application looks like a corner case. On page like that, I wouldn't be surprised if there was penalty using SecondLevelCacheSessionStore, but the numbers you've posted are way too bad to be caused by wicket itself.
My guess is that your model objects are extremely heavy. Maybe with references to your processing layer as well. Of course this will not work with 2nd level cache session store, as the whole thing is serialized. Normally you detach your models so the data kept in memory/session/disk is significantly reduced. I think secondlevelcachesessionstore should be usable for you as well, but that would require not serializing everyhing, rather then that just keep things in memory and "inject" the dependencies on deserialization. -Matej On 9/10/07, Alex Objelean <[EMAIL PROTECTED]> wrote: > > Indeed, it is a very big component hierarchy (It contains at least 3 levels > of nested AjaxTabbedPanel components). > The application is, in fact, a single page and it uses a lot of ajax to > perform the updates. The model reflect the component hierarchy (Appliction > has a single modelObject which nests another objects corresponding to each > component). I do not have a lot of detaching logic, because it is important > to have all the data in the model (caching), also because the services are > very costly operations. > > If this description is not enough for replication, I will be glad to help by > giving you another details. > > Alex. > > > Martijn Dashorst wrote: > > > > How big is the page? Sounds like a really, really big component > > hierarchy. Then it sounds reasonable that the httpsession store is > > much faster: it keeps it in ram, and doesn't use serialization until > > the session is serialized (server shutting down, deciding to put > > session to disk or replication of session across cluster) iirc. > > > > I think we would appreciate some way of replicating your results. I > > assume you can't share the actual code, but could you share a spin-off > > of the page's component structure and a Model that replicates the data > > stuff's size (including the detach logic)? > > > > Martijn > > > > On 9/10/07, Alex Objelean <[EMAIL PROTECTED]> wrote: > >> > >> If the pages wouldn't be serializable, it wouldn't work in development > >> mode. > >> Is it right? > >> > >> I think that it is not necessarily about how large is application, in my > >> case it is about how large is the model I'm working with for that > >> specific > >> request (ajax request). > >> > >> My action was: fetch a subview of a very large table 300x300, each cell > >> has > >> a heavy model object. > >> > >> Alex. > >> > >> > >> Johan Compagner wrote: > >> > > >> > that looks very strange to me. We have also a very large app here and > >> we > >> > dont notice a difference > >> > So i am very curious what is happening at your place then. Are you sure > >> > for > >> > example that the pages > >> > are serializable ? That we don't have constantly exceptions? > >> > > >> > johan > >> > > >> > > >> > On 9/10/07, Alex Objelean <[EMAIL PROTECTED]> wrote: > >> >> > >> >> > >> >> Maybe the profiling was not a perfect one. But still, I have to give > >> up > >> >> using > >> >> SecondSessionLevelStore just because the responsiveness of the > >> >> application > >> >> is very slow. > >> >> > >> >> > >> >> Johan Compagner wrote: > >> >> > > >> >> > invocation count 1?? > >> >> > > >> >> > So you only do 1 request and you profile that? > >> >> > thats not a good test. You have to do plenty and multiply on the > >> same > >> >> > time > >> >> > (10 for 100 request or something like that) > >> >> > to really see the difference. (and have a warm up phase) > >> >> > > >> >> > johan > >> >> > > >> >> > > >> >> > > >> >> > On 9/10/07, Alex Objelean <[EMAIL PROTECTED]> wrote: > >> >> >> > >> >> >> > >> >> >> Matej, I must disagree with you regarding performance issues of the > >> >> >> SecondLevelSessionStore. I've reverted the > >> Application#newSessionStore > >> >> to > >> >> >> HttpSessionStore and this significantly improved the application > >> >> overall > >> >> >> performance. Maybe this is not so obvious for small applications, > >> but > >> >> >> when > >> >> >> it is about a large one - things changes. > >> >> >> > >> >> >> Below, you will find attached two images. The first one is a > >> profiling > >> >> of > >> >> >> an > >> >> >> action when working with HttpSessionStore, the second one is a > >> >> profiling > >> >> >> for > >> >> >> the same action when using SecondSessionLevelStore. The difference > >> is > >> >> >> huge: > >> >> >> 593ms vs 174420ms. I cannot explain what exactly is going on, but > >> I've > >> >> >> noticed that by switching from default SecondLevelSessionStore to > >> the > >> >> >> HttpSessionStore improved a lot the responsiveness of the > >> application. > >> >> >> > >> >> >> Alex. > >> >> >> > >> >> >> http://www.nabble.com/file/p12588790/HttpSessionStore.jpg > >> >> >> http://www.nabble.com/file/p12588790/SecondSessionLevelStore.jpg > >> >> >> > >> >> >> > >> >> >> > >> >> >> > >> >> >> Matej Knopp-2 wrote: > >> >> >> > > >> >> >> > You can revert to httpsessionstore by changing > >> >> >> > Application.newSessionStore method. But that's not recommended. > >> What > >> >> >> > are your performance problems? I doubt it is caused by the > >> session > >> >> >> > store. > >> >> >> > > >> >> >> > -Matej > >> >> >> > > >> >> >> > On 9/7/07, jamieballing <[EMAIL PROTECTED]> wrote: > >> >> >> >> > >> >> >> >> We are trying to do some performance troubleshooting and want to > >> >> >> disable > >> >> >> >> the > >> >> >> >> second level page cache. > >> >> >> >> > >> >> >> >> Is there any way to do this? > >> >> >> >> > >> >> >> >> Thanks, > >> >> >> >> Jamie > >> >> >> >> -- > >> >> >> >> View this message in context: > >> >> >> >> > >> >> >> > >> >> > >> http://www.nabble.com/Disable-the-SecondLevelPageCache--tf4403977.html#a12563895 > >> >> >> >> Sent from the Wicket - User mailing list archive at Nabble.com. > >> >> >> >> > >> >> >> >> > >> >> >> >> > >> >> --------------------------------------------------------------------- > >> >> >> >> To unsubscribe, e-mail: [EMAIL PROTECTED] > >> >> >> >> For additional commands, e-mail: [EMAIL PROTECTED] > >> >> >> >> > >> >> >> >> > >> >> >> > > >> >> >> > > >> >> --------------------------------------------------------------------- > >> >> >> > To unsubscribe, e-mail: [EMAIL PROTECTED] > >> >> >> > For additional commands, e-mail: [EMAIL PROTECTED] > >> >> >> > > >> >> >> > > >> >> >> > > >> >> >> > >> >> >> -- > >> >> >> View this message in context: > >> >> >> > >> >> > >> http://www.nabble.com/Disable-the-SecondLevelPageCache--tf4403977.html#a12588790 > >> >> >> Sent from the Wicket - User mailing list archive at Nabble.com. > >> >> >> > >> >> >> > >> >> >> > >> --------------------------------------------------------------------- > >> >> >> To unsubscribe, e-mail: [EMAIL PROTECTED] > >> >> >> For additional commands, e-mail: [EMAIL PROTECTED] > >> >> >> > >> >> >> > >> >> > > >> >> > > >> >> > >> >> -- > >> >> View this message in context: > >> >> > >> http://www.nabble.com/Disable-the-SecondLevelPageCache--tf4403977.html#a12589190 > >> >> Sent from the Wicket - User mailing list archive at Nabble.com. > >> >> > >> >> > >> >> --------------------------------------------------------------------- > >> >> To unsubscribe, e-mail: [EMAIL PROTECTED] > >> >> For additional commands, e-mail: [EMAIL PROTECTED] > >> >> > >> >> > >> > > >> > > >> > >> -- > >> View this message in context: > >> http://www.nabble.com/Disable-the-SecondLevelPageCache--tf4403977.html#a12589567 > >> Sent from the Wicket - User mailing list archive at Nabble.com. > >> > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: [EMAIL PROTECTED] > >> For additional commands, e-mail: [EMAIL PROTECTED] > >> > >> > > > > > > -- > > Buy Wicket in Action: http://manning.com/dashorst > > Apache Wicket 1.3.0-beta3 is released > > Get it now: http://www.apache.org/dyn/closer.cgi/wicket/1.3.0-beta3/ > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > -- > View this message in context: > http://www.nabble.com/Disable-the-SecondLevelPageCache--tf4403977.html#a12590414 > Sent from the Wicket - User mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
