Jos Henrique Varanda wrote: > Hello Dain, > > I'm using the same ear file in RC3 and 3.0.0. I'm > using Oracle8 db and using CMP 2.0 as well. The > problem is: the same ear executes 100 times slower in > 3.0.0 than in RC3.
What about with hypersonic? > What about transaction demarcation? I'm using a > session bean to coordinate all tasks. There is a > method in that bean that is responsible for doing all > the work. This method's transaction is marked as > "Required". It accesses localy some cmp2.0 entity > beans and returns a collection as a result. The > performance problem occurs when it calls a finder > method that finds all entities in db and then accesses > some of their attributes. Specifically, the > performance decrease is noticed when the session bean > calls the getters accessor methods. These accessors > methods' transaction demarcation are "Required" too. Then you shouldn't get the O(n^2) performance I was talking about earlier. Just check the log for an excessive amount of load queries. Also if you query-modify-query in a loop you can get bad performance because the container must synchronize the data before a query is executed. > Resuming, I have a staless session bean that iterates > in all my entities looking for some attributes which > are stored in a collection. All methods involved are > marked as "Required" in the container-transaction > section in ejb-jar.xml. Remember that this is the same > ear file for both versions: RC3 and 3.0.0 > Any idea of what's happening? Nope. Do you have a profiler? I use Optimize It. > You told me in another thread at jboss forum that the > only demarcation allowed in jboss at this time was the > "Required" one. Does Jboss-3.0.0 already implement the > other demarcations? Since my method is just for > accessing data I could mark all the accessor methods > as "Supports". It could speed things up! JBoss support all of the transaction attributes, but when you use CMP you must always have a transaction. Transaction over head in JBoss is almost immeasurable, so you won't get much of a speed up running without one. -dain _______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
