Georg stop spewing nonsense....Never ever take out the synchronization interceptor! It registers synchronzations with the TM so that the entity bean changes get committed! Please read the for-pay docs or review the archives. I have explained this shit over and over.
I've added a EntityLockMonitor MBean to 3.0.4 and higher. Look in jboss-service.xml to uncomment it. Gives you # contentions in table with bean beans. Also gives averages and other stats. I'll be adding this to docs eventually. Bill > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:jboss-user-admin@;lists.sourceforge.net]On Behalf Of Georg Schmid > Sent: Monday, October 21, 2002 4:32 AM > To: [EMAIL PROTECTED] > Subject: RE: [JBoss-user] Entity Bean Performance Tuning Help > > > Peter, > > I have a similar problem and tried to dig into it. > You may have a look at the thread > http://www.jboss.org/forums/thread.jsp?forum=46&thread=20827 in the > forums. > > To summarize: the EB caching works perfectly (I guess it is as fast as > you can get with JDBC), but getting the rows in memory into a data or > value object is slow. Creating n value objects for n EB instances > involves going through the interceptor stack n times, and this is, where > the time is lost. > > I incrementally stripped down the interceptor stack using a custom > configuration in my jboss.xml, but without much success. > > The only way to really speed up things that I found was removing the > synchronization interceptor, which improves performance by a factor of > 2, if no or only one attribute is read, but makes it worse, if many > attributes have to be read. > > BTW: I used commit option B, read-ahead on-load, and the Instance Per > Transaction setup in my experiments. > > The pattern you found is interesting. Because there are so many things > impacting the performance, it is hard to tell, whom to ask (Dain, Bill, > David,...). > > Bill Burke did some performance tests using ECPerf. Maybe he can report > a bit on the results. > > Regards > Georg > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:jboss-user-admin@;lists.sourceforge.net] On Behalf Of Luttrell, > Peter > Sent: Saturday, October 19, 2002 02:17 > To: '[EMAIL PROTECTED]' > Subject: [JBoss-user] Entity Bean Performance Tuning Help > > > I have something that is taking longer then I would like and am trying > to tune jboss to reduce the time it takes. > > My test scenario is as such: > > JBoss3.0.3 on jdk1.4.1_01 > 1 2.0 CMP Enity bean with about 10 fields and 3 relationships. > I'm using commit-option A so all beans should be cached (see cache > policy below) once loaded. > The first time that I run this it obviously takes longer (filling the > cache), however subsequent times aren't as fast as i would like; see > below: > > I have a method, which does this: > > 1) begin manual transaction with jta > > 2) calls findBySomeCriteria() which returns some 750 ejbs > ->takes 200-300ms (good) > > 3) then iterate through each, calling one of the methods > i do this to fill the readahead cache for all the beans in an > attempt to isolate the performance problem > ->takes 80-100ms (good) > > 4) then iterate through each, and constructing a dataobject that I > use for display purposes > ->takes 2000-2500ms (this seams way too long) > > 5) commit the transaction, blablabla.. > > The problem is step 4 seams to be taking longer then it should. > > I then added some trace to the dataobject constructor method, where I > basically pass in a reference to the ejb and call most of the methods on > it. The trace dumps out the total time the constructor took. I noticed a > weird pattern. Most of the constructions took 0ms, but every 5th or so > it took 15-16ms, which is where all of my time is going. Note that it is > not exactly every 5th and tends to vary a bit. Here's a sample of the > output: > > 18:46:06,840 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,840 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,840 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,840 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,855 INFO [STDOUT] displayBean construction took 15 ms > 18:46:06,855 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,855 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,855 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,855 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,871 INFO [STDOUT] displayBean construction took 16 ms > 18:46:06,871 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,871 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,871 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,871 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,886 INFO [STDOUT] displayBean construction took 15 ms > 18:46:06,886 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,886 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,886 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,886 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,902 INFO [STDOUT] displayBean construction took 16 ms > 18:46:06,902 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,902 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,902 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,902 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,918 INFO [STDOUT] displayBean construction took 16 ms > 18:46:06,918 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,918 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,918 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,918 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,933 INFO [STDOUT] displayBean construction took 15 ms > 18:46:06,933 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,933 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,933 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,949 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,949 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,965 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,965 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,965 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,965 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,965 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,980 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,980 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,980 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,980 INFO [STDOUT] displayBean construction took 0 ms > 18:46:06,996 INFO [STDOUT] displayBean construction took 16 ms > > my ejb-jar.xml file: > > I have not declared any security-constraints for the bean. > I have tried it with transactions on and off (Required/Supports), which > effected performance a little but did not correct the delays i'm seeing. > > my jboss.xml > > I have the bean tied to a custom container config. Here's the custom > config, which i basically copied directly from the standardjboss.xml > file. Note the changes to the cache capacity and age, etc. This is > intended to keep the beans in the cache. > > <container-configurations> > <container-configuration> > <container-name>LongLasting Large CMP 2.x EntityBean > Cache</container-name> > <call-logging>false</call-logging> > > <container-invoker>org.jboss.proxy.ejb.ProxyFactory</container-invoker> > <container-interceptors> > <interceptor>org.jboss.ejb.plugins.LogInterceptor</interceptor> > <interceptor>org.jboss.ejb.plugins.SecurityInterceptor</interceptor> > <interceptor>org.jboss.ejb.plugins.TxInterceptorCMT</interceptor> > <interceptor metricsEnabled = > "true">org.jboss.ejb.plugins.MetricsInterceptor</interceptor> > > <interceptor>org.jboss.ejb.plugins.EntityCreationInterceptor</intercepto > r> > > <interceptor>org.jboss.ejb.plugins.EntityLockInterceptor</interceptor> > > <interceptor>org.jboss.ejb.plugins.EntityInstanceInterceptor</intercepto > r> > > <interceptor>org.jboss.resource.connectionmanager.CachedConnectionInterc > eptor</interceptor> > > <interceptor>org.jboss.ejb.plugins.EntitySynchronizationInterceptor</int > erceptor> > > <interceptor>org.jboss.ejb.plugins.cmp.jdbc.JDBCRelationInterceptor</int > erceptor> > </container-interceptors> > <client-interceptors> > <home> > <interceptor>org.jboss.proxy.ejb.HomeInterceptor</interceptor> > <interceptor>org.jboss.proxy.SecurityInterceptor</interceptor> > <interceptor>org.jboss.proxy.TransactionInterceptor</interceptor> > <interceptor>org.jboss.invocation.InvokerInterceptor</interceptor> > </home> > <bean> > <interceptor>org.jboss.proxy.ejb.EntityInterceptor</interce ptor> > <interceptor>org.jboss.proxy.SecurityInterceptor</interceptor> > <interceptor>org.jboss.proxy.TransactionInterceptor</interceptor> > <interceptor>org.jboss.invocation.InvokerInterceptor</interceptor> > </bean> > <list-entity> > > <interceptor>org.jboss.proxy.ejb.ListEntityInterceptor</interceptor> > <interceptor>org.jboss.proxy.SecurityInterceptor</interceptor> > <interceptor>org.jboss.proxy.TransactionInterceptor</interceptor> > <interceptor>org.jboss.invocation.InvokerInterceptor</interceptor> > </list-entity> > </client-interceptors> > &nb > sp;<instance-pool>org.jboss.ejb.plugins.EntityInstancePool</instance-poo > l> > > <instance-cache>org.jboss.ejb.plugins.EntityInstanceCache</instance-cach > e> > > <persistence-manager>org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager</pe > rsistence-manager> > <transaction-manager>org.jboss.tm.TxManager</transaction-manager> > > <locking-policy>org.jboss.ejb.plugins.lock.QueuedPessimisticEJBLock</loc > king-policy> > <container-cache-conf> > > <cache-policy>org.jboss.ejb.plugins.LRUEnterpriseContextCachePolicy</cac > he-policy> > <cache-policy-conf> > <min-capacity>50</min-capacity> > <max-capacity>10000</max-capacity> > <overager-period>100000</over ager-period> > <max-bean-age>31536000</max-bean-age> > <resizer-period>100000</resizer-period> > <max-cache-miss-period>60</max-cache-miss-period> > <min-cache-miss-period>1</min-cache-miss-period> > <cache-load-factor>0.75</cache-load-factor> > </cache-policy-conf> > </container-cache-conf> > <container-pool-conf> > <MaximumSize>100</MaximumSize> > </container-pool-conf> > <commit-option>A</commit-option> > </container-configuration> > </container-configurations> > > > I have also tried replacing the one of the other cache policies > (org.jboss.ejb.plugins.NoPassivationCachePolicy) and recieved no > differnet results. > > Am i doing something glaringly wrong? > Can anyone suggest what else to try to get the times down? > > thanks. > .peter > > > > > This transmission contains information solely for intended recipient and > may be privileged, confidential and/or otherwise protect from > disclosure. If you are not the intended recipient, please contact the > sender and delete all copies of this transmission. This message and/or > the materials contained herein are not an offer to sell, or a > solicitation of an offer to buy, any securities or other instruments. > The information has been obtained or derived from sources believed by us > to be reliable, but we do not represent that it is accurate or complete. > Any opinions or estimates contained in this information constitute our > judgment as of this date and are subject to change without notice. Any > information you share with us will be used in the operation of our > business, and we do not request and do not want any material, nonpublic > information. Absent an express prior written agreement, we are not > agreeing to treat any information confidentially and will use any and > all information and reserve the right to publish or disclose any > information you share with us. > > > > ------------------------------------------------------- > This sf.net email is sponsored by:ThinkGeek > Welcome to geek heaven. > http://thinkgeek.com/sf > _______________________________________________ > JBoss-user mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/jboss-user ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
