September 2007 - jboss-user - Jboss List Archives

[Performance Tuning] - Re: JBoss AS Freezes with 99.9% CPU After 1 Hour in Producti

by PeterJ

It is normal for many threads to be blocked, that just means they are not using the cpu at this time. I am somewhat concerned with the "(Interpreted frame)" text on each method in the stack trace for the threads. I think that might mean that you are running an interpreter, instead of using the just-in-time compiler to get compiled code. I would have to research this more to be sure. What is the command line used to start the app server? Looks like your are giving the JVM free reign to resize the heap as necessary. I usually prefer setting specific heap sizes with min=max; usually heap of 1200MB and newsize of 300MB is a good starting point for tuning. Other than that, I don't see anything that jumps out at me. Looks like most threads are waiting for something to do (you must be using Apache as a front end, considering the number of AjpProcessor entries; and it looks like some Oracle calls are in progress). You should take multiple thread dumps and compare the threads from each dump. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088618#4088618 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088618

18 years, 7 months

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[JBoss Seam] - Re: multiple calls to same method from <s:div rendered...>

by asookazian

"amitev" wrote : And never in the jsf spec is told that your getter will be invoked only once per request why would they allow it to be called more than once? in case of network or db connectivity problems? seems the user would just refresh their browser/screen... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088617#4088617 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088617

18 years, 7 months

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[JBoss Seam] - Re: s:decorate input control ID change from 1.2 to 2.0

by tynor

http://jira.jboss.org/jira/browse/JBSEAM-1972 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088615#4088615 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088615

18 years, 7 months

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[Performance Tuning] - Re: JBoss AS Freezes with 99.9% CPU After 1 Hour in Producti

by gudmundsonsc

Here is the information from jmap and jstack for a server with CPU currently maxed at 99.9% as I described. Thread Dump: http://www.mtc.byu.edu/jboss/jboss.jstack.txt Heap: http://www.mtc.byu.edu/jboss/jboss.jmap.heap.txt Heap Histogram: http://www.mtc.byu.edu/jboss/jboss.jmap.histo.txt Perm Stats: http://www.mtc.byu.edu/jboss/jboss.jmap.permstat.txt View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088614#4088614 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088614

18 years, 7 months

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[JBoss Seam] - Re: multiple calls to same method from <s:div rendered...>

by asookazian

thx for the feedback. we are creating a Java version of existing C#/ASP.NET use cases using Seam. we are going to use the existing sprocs first and then convert them to pseudo-code/logic and use JPA entity beans from there. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088611#4088611 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088611

18 years, 7 months

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[JBoss Seam] - Re: multiple calls to same method from <s:div rendered...>

by amitev

And never in the jsf spec is told that your getter will be invoked only once per request View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088610#4088610 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088610

18 years, 7 months

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[Clustering/JBoss] - Re: Use TomcatClusteringCache or create my own cache service

by bstansberry＠jboss.com

It's better to use your own cache. You could possibly get away with using the TomcatClusteringCache, but we basically regard that cache as ours to do with as we will, so if you use it you could have upgrade issues later. (BTW, the TomcatClusteringCache is also used for distributable web session replication.) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088609#4088609 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088609

18 years, 7 months

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[Performance Tuning] - Re: JBoss AS Freezes with 99.9% CPU After 1 Hour in Producti

by PeterJ

Are you able to take a thread dump, and if so what does it show? Note that you might have to take multiple dumps to pinpoint the problem. Last time I looked into a problem similar to this it turned out that with one of the deployed applications, if you did a specific sequence of requests, it would go into an infinite loop. It took getting only 3 requests in that state to get the processor up to 99% busy. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088608#4088608 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088608

18 years, 7 months

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[JBoss Seam] - Re: multiple calls to same method from <s:div rendered...>

by fhh

Why don't you use: a.) Datasources. Opening connections is an expensive operation. b.) Use a SELECT statement instead of a call to a stored procedure if you want to retrieve data. c.) @Factory for choices? d.) Use entities and <s:selectitems> to create select items. e.) Use Hibernate caching to avoid db roundtrips. f.) Use Seam's query object to retrieve a filtered list of entities. No offense, but if your requirements are totally different from the "Seam way of doing things" (TM) you will propably be better off without it. Regards Felix View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088607#4088607 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088607

18 years, 7 months

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[JBoss Seam] - Re: JBoss EL performance vs Sun EL

by mgrouch

One more offending function: too many calls to the org.jboss.seam.Component.hasAnnotation method also significantly degrade performance per our profiler snapshot (although not for the code I gave in this thread). It was also observed in this thread http://www.jboss.com/index.html?module=bb&op=viewtopic&t=119573 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088606#4088606 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4088606

18 years, 7 months

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jboss-user September 2007