Yeah, sure. I have attached an html-file. I hope it will be accessible thru nabble. http://www.nabble.com/file/p24164853/Call_Tree_2.html Call_Tree_2.html
Emmanuel Venisse-2 wrote: > > It it possible to have a stack trace of this threads to know where to look > in the code? > > Emmanuel > > On Mon, Jun 22, 2009 at 9:28 AM, Marc Lustig <m...@marclustig.com> wrote: > >> >> Hi there, >> as requested I repost this here. >> >> our teams have been suffering from the bad performance of the >> Continuum-UI >> for a long time . I found now the time to profile one of our servers >> running >> 3 Continuum-1.2.2-instances (webapps) on a single Tomcat6, JDK6, RHEL4 >> and >> Oracle-RAC as database-backend. >> >> The tomcat-JVM is consuming between 150 and 200 % of our dual-core >> Xeon-server. >> This is just the tomcat-JVM, not any maven-process running aside. >> And I am not talking about peaks, the load is as high like that for >> hours. >> >> This is a snapshot taken by Jprofiler at a time without any user-activity >> on >> one of the UI's. >> >> the 3 threads causing the highest load are: >> 37,3% - 54.415 ms - 5 inv. >> org.jpox.AbstractPersistenceManager.detachCopyAll >> 13,6% - 19.842 ms - 14 inv. >> org.codehaus.plexus.jdo.PlexusJdoUtils.getObjectById >> 34,5% - 50.362 ms - 4.480 inv. >> edu.emory.mathcs.backport.java.util.concurrent.BlockingQueue.poll >> (100% = total load caused by the JVM) >> >> The first 2 threads are caused by the JDO-impl. Is it possible that >> Continuum has an extremely "bad" fetching stragety, e. g. doing all kinds >> of >> unnecessary loading cascades? This is my first impression. >> >> About the 3rd thread, I have no idea why this BlockingQueue is causing >> such >> a tremendous load. >> What is the purpose of this thread? Can it be optimized. >> >> The slow performance is not only while adding new project groups. There >> is >> a >> high CPU-load almost constantly between 100 and 200 % (on dual core): >> >> 12795 tomcat 16 0 171 7238:01 40.9 12.0g 6.3g 10m S java >> >> thanks >> >> Marc >> -- >> View this message in context: >> http://www.nabble.com/Profiling-results-for-Continuum-tp24142787p24142787.html >> Sent from the Continuum - Dev mailing list archive at Nabble.com. >> >> > > -- View this message in context: http://www.nabble.com/Profiling-results-for-Continuum-tp24142787p24164853.html Sent from the Continuum - Dev mailing list archive at Nabble.com.
