July 2010 - jboss-user - Jboss List Archives

Re: [jboss-user] [Performance Tuning] - Memory consumption 1h after JBoss start

by Peter Johnson

Peter Johnson [http://community.jboss.org/people/peterj] replied to the discussion "Memory consumption 1h after JBoss start" To view the discussion, visit: http://community.jboss.org/message/554214#554214 -------------------------------------------------------------- I ageee that your explanation of setting MaxTenuringThreshold to 0 is the commonly accepted advice. But of course, I disagree :D The problem with setting MaxTenuringThreshold to 0 is that at the time the minor GC takes place you will have a lot of temporary objects that are still in use being promoted to the tenured generation. Then the tenured generation fills up quicker and you end up doing major CMS collections more often. It is usually better to let objects bounce around a few times between the survivor spaces in order to sift out objects that survive only a few collections and are then discarded, thus ensuring that only object that plan to stay around for a while get tenured.Tenuring temporary object is much more expensive than not tenuring long-lived objects. Test I have done show that the minor collection time, even with MaxTenuringThreshold not set to 0, is consistently less that the two pauses times caused by the CMS collectior for a major collection. In addtion, having MaxTenuringThreshold set to a non-zero value has, in my tests, always outperfomed setting MaxTenuringThreshold to 0 (higher throughput, lower response times). At least, that is what I have observed in the many load tests that I have performed. Of course, all apps are different - the reader is urged to perform his or her own load tests to see how their apps respond. And Ruchir, I agree with you that discussions like this are benefitial to the community. :) Hopefully the readers can take our two views into consideration and find what works best for their apps. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/554214#554214] Start a new discussion in Performance Tuning at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

15 years, 9 months

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Re: [jboss-user] [jBPM] - Can a mail node stop to contact mail server and just generate a mail file?

by Tun Mang

Tun Mang [http://community.jboss.org/people/tunmang] replied to the discussion "Can a mail node stop to contact mail server and just generate a mail file?" To view the discussion, visit: http://community.jboss.org/message/554211#554211 -------------------------------------------------------------- Hi HuiSheng: Initially we are looking for a solution either in jbpm.mail.property or in jbpm.default.cfg.xml to turn off the mail session, or something like that. But since we already implemented MailProducer (to generate the physical mail file), the solution is still good for us. Thank you so much for your help. Tun Mang -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/554211#554211] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

15 years, 9 months

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Re: [jboss-user] [Datasource Configuration] - I have got this error configuring jboss4.2.3 with mysql

by Peter Johnson

Peter Johnson [http://community.jboss.org/people/peterj] replied to the discussion "I have got this error configuring jboss4.2.3 with mysql" To view the discussion, visit: http://community.jboss.org/message/554200#554200 -------------------------------------------------------------- Looks like you named your datasource something other than DefaultDS. You will have to look through the various *-service.xml files changing all references to DefaultDS to the datasource name you used for MySQL. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/554200#554200] Start a new discussion in Datasource Configuration at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

15 years, 9 months

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Re: [jboss-user] [JBoss Messaging] - Securing JBoss Messaging and EJB3

by Peter Johnson

Peter Johnson [http://community.jboss.org/people/peterj] replied to the discussion "Securing JBoss Messaging and EJB3" To view the discussion, visit: http://community.jboss.org/message/554199#554199 -------------------------------------------------------------- I'm sorry, but I don't have the time to read through all the stuff you posted and point of specific corrections or changes you have to make to accomplish this. However, if I understand correctly what you are trying to do, there is an example of what you want to do in the book JBoss in Action, chapter 8, section 8.5.2. You can always download the source code for th book and build target 06 in project ch08 (open the index.html in the base directory for detailed instructions), that target builds a MDB that uses a secured destination. (The book uses a database for the authentication, but you can easily change that to use properties files - other sections of the book tell you how) -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/554199#554199] Start a new discussion in JBoss Messaging at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

15 years, 9 months

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Re: [jboss-user] [Beginner's Corner] - JBoss Supported Java Standards

by Peter Johnson

Peter Johnson [http://community.jboss.org/people/peterj] replied to the discussion "JBoss Supported Java Standards" To view the discussion, visit: http://community.jboss.org/message/554195#554195 -------------------------------------------------------------- 1) Yes, and no. It means that the App Server must provide that functionality, whther it does so as part of the JVM or not is up to the App Server vendor. Example: Java EE 5 requires Java Util Logging; this logging is part of the JVM, whether the App Server provides funcionality around this or not is up to the vendor; JBoss AS 5.x recognizes Java Util Logging and redirects it to Log4J which performs the actual logging. 2) Yes the App Server must obey the JNDI SPI specifications. Typically, for this type of functionality, the JVM provides a rudimentary implementation that works just fine for a stand-alone app. The App Server will implement more robust funtionlaity to support multiple deployed apps and remote apps. So JBoss AS does not reply just on the JVM's JNDI implementation but rather provides its own (at least, that is my understanding- I haven't researched the JNDI code specifically, but I know, for instance, that my statements apply to RMI). -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/554195#554195] Start a new discussion in Beginner's Corner at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

15 years, 9 months

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[jBPM] - why jBPM4.4 isn't include schemadocs?

by sihao huang

sihao huang [http://community.jboss.org/people/hsihao] created the discussion "why jBPM4.4 isn't include schemadocs?" To view the discussion, visit: http://community.jboss.org/message/554194#554194 -------------------------------------------------------------- Schemadocs is to be included in jBPM4.3 release,and actually it useful. I can get it from anywhere? Please tell me,ths . Or jBPM4.3's schemadocs is not outdate? -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/554194#554194] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

15 years, 9 months

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Re: [jboss-user] [JBoss Microcontainer Development POJO Server] - Implementing a non-flat deployment for Weld Integration

by Ales Justin

Ales Justin [http://community.jboss.org/people/alesj] replied to the discussion "Implementing a non-flat deployment for Weld Integration" To view the discussion, visit: http://community.jboss.org/message/554191#554191 -------------------------------------------------------------- > > How often is this - loadBeanDeploymentArchive - method used? > Depends how many extensions are present, and how many beans/classes they add. It's used once per extension and once per bean or class it adds. So potentially, a lot... OK, thought so as well. Just wanted to make sure. :-) > > Or, shouldn't the (potential) operation [Archive|Deployment]::isReachable(Archive other) be O(1), > > a simple hash lookup of pre-build reachable archives / deployments? > > > That seems sensible to me. At least that's how I would impl things --> building proper indexes when things get deployed. So any potential lookup would be super simple aka fast. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/554191#554191] Start a new discussion in JBoss Microcontainer Development POJO Server at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

15 years, 9 months

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Re: [jboss-user] [JBoss Microcontainer Development POJO Server] - Implementing a non-flat deployment for Weld Integration

by Pete Muir

Pete Muir [http://community.jboss.org/people/petemuir] replied to the discussion "Implementing a non-flat deployment for Weld Integration" To view the discussion, visit: http://community.jboss.org/message/554189#554189 -------------------------------------------------------------- > Ales Justin wrote: > > How often is this - loadBeanDeploymentArchive - method used? Depends how many extensions are present, and how many beans/classes they add. It's used once per extension and once per bean or class it adds. So potentially, a lot... > Or, shouldn't the (potential) operation [Archive|Deployment]::isReachable(Archive other) be O(1), > a simple hash lookup of pre-build reachable archives / deployments? That seems sensible to me. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/554189#554189] Start a new discussion in JBoss Microcontainer Development POJO Server at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

15 years, 9 months

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Re: [jboss-user] [JBoss Microcontainer Development POJO Server] - Implementing a non-flat deployment for Weld Integration

by Ales Justin

Ales Justin [http://community.jboss.org/people/alesj] replied to the discussion "Implementing a non-flat deployment for Weld Integration" To view the discussion, visit: http://community.jboss.org/message/554185#554185 -------------------------------------------------------------- How often is this - loadBeanDeploymentArchive - method used? Or, shouldn't the (potential) operation [Archive|Deployment]::isReachable(Archive other) be O(1), a simple hash lookup or pre-build reachable archives / deployments? -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/554185#554185] Start a new discussion in JBoss Microcontainer Development POJO Server at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

15 years, 9 months

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Re: [jboss-user] [JBoss Microcontainer Development POJO Server] - Implementing a non-flat deployment for Weld Integration

by Pete Muir

Pete Muir [http://community.jboss.org/people/petemuir] replied to the discussion "Implementing a non-flat deployment for Weld Integration" To view the discussion, visit: http://community.jboss.org/message/554184#554184 -------------------------------------------------------------- How much of an efficiency saving is using the map over walking the graph? -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/554184#554184] Start a new discussion in JBoss Microcontainer Development POJO Server at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

15 years, 9 months

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jboss-user July 2010