Hi Bob, I found out the root source ARGGG
It seems like a Bug in the JAVA JVM, see this Blog post, it fixed my issues: http://blog.wpkg.org/2012/07/01/java-leap-second-bug-30-june-1-july-2012-fix/ I did not turn on ntp anymore. Sebastian 2012/7/2 [email protected] <[email protected]> > Hi Bob, > > I don't know yet. The issue is not resolved yet on our server. > I will post something to this mailing list as soon as I have found out how > we were able to solve our issues. Maybe it will help you too. > > I think it has something todo with the Java JVM installation/settings. > You could try out downloading another JVM from the java.com. A Java JVM > installation is actually an unpacked ZIP file so you can run > $JAVA_HOME/bin/java DoJavaTest with any Java runtime that you download and > "install". > > Sebastian > > > 2012/7/2 bob lin <[email protected]> > >> On 07/02/2012 03:17 PM, [email protected] wrote: >> >> Hi Bob, >> >> I recently saw something similar on a server ... >> >> You should check if there is an issue with Java in general. >> I don't think that its an OpenMeetings related problem. >> >> You could try for example this simple Java Test: >> http://pastebin.com/DmhcAuVE >> >> It should print a Date/Time every 0,5 seconds. >> I've attached a compiled version of the programm. >> You can run it using: java DoJavaTest >> >> I guess you will see that even with such simple programm your CPU is at >> 100%. >> >> >> Sebastian >> >> >> 2012/7/1 bob lin <[email protected]> >> >>> Dear Developers: >>> First, thanks for developing such a excellent software. It works fine , >>> but the cpu load on server side is abnormally high . >>> >>> Phenomena : >>> The Openmeetings works fine on every aspect. But on the server side( a >>> 16 core system ) , the java process takes 1000% ~ 1100% CPU time, and >>> about 10~15 kernel irq request ( [ksoftirqd/3] for example ) each takes >>> 30% , the total load of CPU reachs 2200% . Whether the user is logged in >>> or not doesn't change the situation. >>> >>> System Info : >>> The openmeetings version is 1_9_1_r4707, The jre version is >>> jre1.6.0_33/jre1.7.0_5 . I use libreoffice 3.5 . The system is CentOS >>> 6.2 x86_64 with MySQL Ver 14.14 Distrib 5.1.61. >>> >>> I follow the configuration instructions on >>> https://code.google.com/p/openmeetings/wiki/InstallationCentOS5 >>> But with some newer version software (Imagemagick, ffmpeg) >>> >> >> >> >> -- >> Sebastian Wagner >> https://twitter.com/#!/dead_lock >> http://www.openmeetings.de >> http://www.webbase-design.de >> http://www.wagner-sebastian.com >> [email protected] >> >> >> Yeah , The sample program doesn't even update the time , and CPU is >> 200%!! , In a single CPU test environment the java environment just >> functioning normally , Thanks for your advice , and is there any solutions >> you may advice? >> >> > > > -- > Sebastian Wagner > https://twitter.com/#!/dead_lock > http://www.openmeetings.de > http://www.webbase-design.de > http://www.wagner-sebastian.com > [email protected] > -- Sebastian Wagner https://twitter.com/#!/dead_lock http://www.openmeetings.de http://www.webbase-design.de http://www.wagner-sebastian.com [email protected]
